# Esperanto opposites: how mal- doubles your vocabulary

Source: https://esperantopedia.org/phrases/opposites/
Language: en
Updated: 2026-10-11

> Put mal- before a word to get its exact opposite: bona becomes malbona. 74 pairs with pronunciation, plus the opposites that need no mal-.

Esperanto makes an opposite by putting the prefix ***mal-*** in front of a word: *bona* "good" → ***malbona*** "bad", *granda* "big" → ***malgranda*** "small", *fermi* "to close" → ***malfermi*** "to open". Learn one root and you know both ends of the scale. The tables below give 74 pairs by theme. Pronunciation guides split words into syllables, with the stressed syllable in capitals.

## How mal- works

*Mal-* is one of the ten official [prefixes](https://esperantopedia.org/grammar/prefixes/). The *Fundamento* (1905) explains it in one line: it denotes opposites, as in *bona* – *malbona*. PMEG defines it as "the directly opposite idea" and adds that it is used only where a direct opposite exists. It never changes the word class (see [word building](https://esperantopedia.org/grammar/word-building/)):

- **Adjectives** are the most common: *varma* "warm" → *malvarma* "cold".
- **Verbs** reverse the action: *permesi* "to allow" → *malpermesi* "to forbid".
- **Adverbs and small words**: *frue* "early" → *malfrue* "late", *antaŭ* → *malantaŭ* "behind".
- **Nouns**: *lumo* "light" → *mallumo* "darkness".

On its own *mal-* is also a root: *malo* "the opposite". *La malo de "alta" estas "malalta".* – "The opposite of 'high' is 'low'."

**Stress** follows the usual rule, the second-to-last vowel, so it normally stays off *mal-*: *mal-BO-na*, *mal-FER-mi*. In *malpli* "less", *malplej* "least" and *maltro* "too little" there are only two vowels, so the stress lands on the prefix: MAL-pli, MAL-plej, MAL-tro (PMEG).

## Size and quantity

| Esperanto | English | Opposite | English | Pronunciation of the opposite |
|---|---|---|---|---|
| *granda* | big | *malgranda* | small | mal-GRAN-da |
| *longa* | long | *mallonga* | short | mal-LON-ga |
| *larĝa* | wide | *mallarĝa* | narrow | mal-LAR-ĝa |
| *alta* | tall, high | *malalta* | low | mal-AL-ta |
| *dika* | thick | *maldika* | thin | mal-DI-ka |
| *profunda* | deep | *malprofunda* | shallow | mal-pro-FUN-da |
| *peza* | heavy | *malpeza* | light | mal-PE-za |
| *plena* | full | *malplena* | empty | mal-PLE-na |
| *multa* | much, many | *malmulta* | little, few | mal-MUL-ta |
| *tro* | too much | *maltro* | too little | MAL-tro |
| *pli* | more | *malpli* | less | MAL-pli |
| *plej* | most | *malplej* | least | MAL-plej |
| *forta* | strong | *malforta* | weak | mal-FOR-ta |
| *ofta* | frequent | *malofta* | rare | mal-OF-ta |

## Temperature, light and touch

The [colours page](https://esperantopedia.org/phrases/colors/) shows how *hel-* and *malhel-* make light and dark shades.

| Esperanto | English | Opposite | English | Pronunciation of the opposite |
|---|---|---|---|---|
| *varma* | warm | *malvarma* | cold | mal-VAR-ma |
| *hela* | bright | *malhela* | dark | mal-HE-la |
| *lumo* | light | *mallumo* | darkness | mal-LU-mo |
| *seka* | dry | *malseka* | wet | mal-SE-ka |
| *mola* | soft | *malmola* | hard | mal-MO-la |
| *glata* | smooth | *malglata* | rough | mal-GLA-ta |
| *akra* | sharp | *malakra* | blunt | mal-A-kra |
| *pura* | clean | *malpura* | dirty | mal-PU-ra |
| *freŝa* | fresh | *malfreŝa* | stale | mal-FRE-ŝa |
| *sata* | full (after eating) | *malsata* | hungry | mal-SA-ta |

## Age, time and speed

| Esperanto | English | Opposite | English | Pronunciation of the opposite |
|---|---|---|---|---|
| *juna* | young | *maljuna* | old (of people) | mal-JU-na |
| *nova* | new | *malnova* | old (of things) | mal-NO-va |
| *frua* | early | *malfrua* | late | mal-FRU-a |
| *frue* | early (adverb) | *malfrue* | late (adverb) | mal-FRU-e |
| *rapida* | fast | *malrapida* | slow | mal-ra-PI-da |
| *ofte* | often | *malofte* | rarely | mal-OF-te |

## Quality, character and feelings

| Esperanto | English | Opposite | English | Pronunciation of the opposite |
|---|---|---|---|---|
| *bona* | good | *malbona* | bad | mal-BO-na |
| *bela* | beautiful | *malbela* | ugly | mal-BE-la |
| *facila* | easy | *malfacila* | difficult | mal-fa-CI-la |
| *ĝoja* | joyful | *malĝoja* | sad | mal-ĜO-ja |
| *feliĉa* | happy | *malfeliĉa* | unhappy | mal-fe-LI-ĉa |
| *riĉa* | rich | *malriĉa* | poor | mal-RI-ĉa |
| *saĝa* | wise | *malsaĝa* | foolish | mal-SA-ĝa |
| *ĝentila* | polite | *malĝentila* | rude | mal-ĝen-TI-la |
| *agrabla* | pleasant | *malagrabla* | unpleasant | mal-a-GRA-bla |
| *kuraĝa* | brave | *malkuraĝa* | cowardly | mal-ku-RA-ĝa |
| *pacienca* | patient | *malpacienca* | impatient | mal-pa-ci-EN-ca |
| *ĝusta* | correct | *malĝusta* | wrong | mal-ĜUS-ta |
| *vera* | true | *malvera* | false | mal-VE-ra |
| *sama* | same | *malsama* | different | mal-SA-ma |
| *sana* | healthy | *malsana* | ill | mal-SA-na |
| *amiko* | friend | *malamiko* | enemy | mal-a-MI-ko |
| *ami* | to love | *malami* | to hate | mal-A-mi |
| *ŝati* | to like | *malŝati* | to dislike | mal-ŜA-ti |
| *espero* | hope | *malespero* | despair | mal-es-PE-ro |
| *ordo* | order | *malordo* | disorder, mess | mal-OR-do |

## Movement and actions

With verbs, *mal-* gives the reverse action.

| Esperanto | English | Opposite | English | Pronunciation of the opposite |
|---|---|---|---|---|
| *fermi* | to close | *malfermi* | to open | mal-FER-mi |
| *ŝalti* | to switch on | *malŝalti* | to switch off | mal-ŜAL-ti |
| *ligi* | to tie | *malligi* | to untie | mal-LI-gi |
| *ŝlosi* | to lock | *malŝlosi* | to unlock | mal-ŜLO-si |
| *kovri* | to cover | *malkovri* | to uncover, discover | mal-KOV-ri |
| *vesti* | to dress | *malvesti* | to undress | mal-VES-ti |
| *fari* | to make, do | *malfari* | to undo | mal-FA-ri |
| *plenigi* | to fill | *malplenigi* | to empty | mal-ple-NI-gi |
| *pliigi* | to increase | *malpliigi* | to decrease | mal-pli-I-gi |
| *permesi* | to allow | *malpermesi* | to forbid | mal-per-ME-si |
| *helpi* | to help | *malhelpi* | to hinder | mal-HEL-pi |
| *aperi* | to appear | *malaperi* | to disappear | mal-a-PE-ri |
| *sukcesi* | to succeed | *malsukcesi* | to fail | mal-suk-CE-si |
| *dormi* | to sleep | *maldormi* | to stay awake | mal-DOR-mi |
| *supreniri* | to go up | *malsupreniri* | to go down | mal-su-pre-NI-ri |
| *instali* | to install | *malinstali* | to uninstall | mal-in-STA-li |

With some verbs PMEG notes a sharper sense. *Maldormi* means to stay awake when you would normally sleep, and *malhavi* "to lack" means not having something you feel you should have.

## Place and direction

| Esperanto | English | Opposite | English | Pronunciation of the opposite |
|---|---|---|---|---|
| *supre* | above | *malsupre* | below | mal-SU-pre |
| *supren* | up | *malsupren* | down | mal-SU-pren |
| *supra* | upper | *malsupra* | lower | mal-SU-pra |
| *antaŭ* | in front of | *malantaŭ* | behind | mal-AN-taŭ |
| *antaŭe* | in front | *malantaŭe* | at the back | mal-an-TAŬ-e |
| *dekstra* | right | *maldekstra* | left | mal-DEKS-tra |
| *dekstre* | on the right | *maldekstre* | on the left | mal-DEKS-tre |
| *proksima* | near | *malproksima* | far | mal-prok-SI-ma |

## Mal- versus ne

*Ne* only denies, while *mal-* states the opposite. *Ne laŭdi* "not to praise" says nothing bad, but *mallaŭdi* "to blame, to condemn" does. PMEG gives these contrasts:

| Base word | With *ne* | With *mal-* |
|---|---|---|
| *utila* "useful" | *neutila* "without use" | *malutila* "harmful" |
| *afabla* "kind" | *neafabla* "not kind" | *malafabla* "unkind, rude" |
| *amiko* "friend" | *neamiko* (rare) "neither friend nor enemy" | *malamiko* "enemy" |

So *ne bona* "not good" leaves the middle open, while *malbona* "bad" is the other end of the scale. The two can be combined, as in *ne malbona* "not bad".

## Opposites without mal-

Many opposites are two unrelated roots, so no *mal-* is needed. PMEG lists *tago – nokto* "day – night", *komenci – fini* "to begin – to end" and *nigra – blanka* "black – white" among its examples.

| Esperanto | English | Esperanto | English |
|---|---|---|---|
| *tago – nokto* | day – night | *komenci – fini* | to begin – to end |
| *demandi – respondi* | to ask – to answer | *veni – iri* | to come – to go |
| *doni – preni* | to give – to take | *aĉeti – vendi* | to buy – to sell |
| *forgesi – memori* | to forget – to remember | *nigra – blanka* | black – white |
| *nordo – sudo* | north – south | *sur – sub* | on – under |

Three other cases need a note:

- **Male and female** use the suffix *-in-*, not *mal-*: *viro* "man" – *virino* "woman", *patro* "father" – *patrino* "mother". See [suffixes](https://esperantopedia.org/grammar/suffixes/).
- **Always and never** come from the correlatives: *ĉiam* "always" – *neniam* "never". See [correlatives](https://esperantopedia.org/grammar/correlatives/).
- **Short alternatives** exist beside a few *mal-* words: *kurta* beside *mallonga*, *frida* beside *malvarma*, *liva* beside *maldekstra*. PMEG says *kurta* and *frida* appear mostly in poetry and technical words (*fridujo* "refrigerator"), and that the *mal-* word always remains correct.

## How many words mal- gives you

On 8 October 2026 we counted the *mal-* words in the ReVo data behind our [dictionary](https://esperantopedia.org/dictionary/), which has 32,762 entries. An entry counted when its headword starts with *mal-* and ReVo files it as a derivation of another word with *mal-*. We left out the root *mal-* itself (*malo, male*) and look-alikes such as *malto* "malt" and *malgraŭ* "despite".

The result is **784 words**, 2.4% of all entries, built on 463 different ReVo root articles. Without the prefix each would be one more word to memorise. In our [list of the 1,000 most common words](https://esperantopedia.org/learn/common-words/), 42 begin with *mal-*, led by *malbona* (rank 229), *malgranda* (268), *malpli* (297) and *malnova* (306).

## In sentences

| Esperanto | English |
|---|---|
| *La kafo estas tro malvarma.* | The coffee is too cold. |
| *Tio ne estas malbona ideo.* | That is not a bad idea. |
| *Mia avo estas maljuna, sed li ne estas malsaĝa.* | My grandfather is old, but he is not foolish. |

Learn the [most common words](https://esperantopedia.org/learn/vocabulary/) first, then add their opposites.

## Common questions

### How do you say the opposite of a word in Esperanto?

Put *mal-* in front of it: *granda* "big" → *malgranda* "small". The ending stays, so adjectives, verbs, adverbs and nouns all work.

### What is the difference between mal- and ne?

*Ne* means "not", *mal-* means "the opposite". *Neutila* is "of no use", while *malutila* is "harmful".

### Can you put mal- in front of any word?

No, only where a direct opposite exists. Many opposites are separate roots, such as *tago – nokto* "day – night".

### How many Esperanto words use mal-?

In the ReVo data we checked, 784 words are built with it (counted on 8 October 2026).

### Is the opposite of "man" malviro?

No. The female is marked with *-in-*: *viro* "man" → *virino* "woman".

## Sources

- [PMEG – MAL](https://bertilow.com/pmeg/vortfarado/afiksoj/prefiksoj/mal.html)
- [PMEG – Prefixes](https://bertilow.com/pmeg/vortfarado/afiksoj/prefiksoj/index.html)
- [Fundamento de Esperanto – Ekzercaro (affix explanations)](https://www.akademio-de-esperanto.org/fundamento/ekzercaro.html)
- [ReVo (Reta Vortaro): mal-](https://reta-vortaro.de/revo/art/mal.html) and every word in the tables, e.g. [bona, malbona](https://reta-vortaro.de/revo/art/bon.html)
- Frequency ranks: our list of the 1,000 most common words, counted in Tatoeba sentences (CC BY 2.0 FR)