Kvara Oficiala Aldono (4OA): the 118 official roots
All 118 roots made official by Kvara Oficiala Aldono (4OA) (1929), alphabetically, with their meaning in English and a link to each dictionary entry.
- abiturient- high-school graduate
- abstin- abstention
- aksel- armpit
- aktual- topical
- akvafort- an etching
- albin- albino
- alen- awl
- alo- aloe
- alumini- aluminium
- amar- bitterness
- amor- sexual love
- anilin- aniline
- aŭtonom- autonomous
- biret- biretta
- bis- demand an encore
- bombast- bombast
- ceramik- ceramics
- ĉevron- rafter
- deriv- derive
- diluv- deluge
- dimensi- dimension
- dok- dry dock
- ekzakt- exact
- empiri- empirical evidence
- establ- establishment
- fagot- bassoon
- fikci- fiction
- gencian- gentian
- genist- broom
- grund- ground
- ĝemel- twin
- hegemoni- hegemony
- helic- helix
- hipnot- hypnosis
- hum- humus
- imun- immune
- inaŭgur- inauguration
- indeks- index
- indig- indigo
- indiĝen- indigenous person
- inert- inert
- inflam- inflammation
- intelekt- intellect
- intens- intense
- inund- flood
- invers- inverse
- kali- potassium
- kalv- bald
- karbon- carbon
- kastanjet- castanet
- kinin- quinine
- klaĉ- babble
- klor- chlorine
- kluk- cluck
- knar- creak, screeching noise
- koincid- coincidence
- kolizi- collision
- komision- commission
- kondicional- conditional tense
- konker- conquest
- konsekr- to consecrate
- kontinu- continuous
- korol- corolla
- kreditor- creditor
- kverel- quarrel
- lamen- lamina
- lament- lament
- lat- lath
- later- side
- lens- lens
- lob- lobe
- lord- lord
- lumbrik- earthworm
- medol- marrow
- merkat- market
- munt- assemble
- murd- murder
- narkot- narcotize
- nas- eel trap
- natri- sodium
- oksid- oxide
- oleandr- oleander
- orbit- orbit
- panel- panel
- paŝtel- pastel
- patrici- patrician
- pedagog- pedagogue
- pedagogi- pedagogy
- pelerin- pelerine
- pioĉ- pick
- pivot- pivot
- plag- plague
- plantag- plantago
- plastik- plastic art
- pleb- plebs
- plur several
- plural- plural
- podi- podium
- provok- provocation
- redukt- reduction
- regent- regent
- rezist- resistance
- sacerdot- priest
- sekur- safe
- skem- schema
- solvent- solvent
- splen- blues
- stamen- stamen
- stipendi- stipend
- subvenci- subsidy
- ŝpat- spade
- trafik- traffic
- uzur- usury
- valid- validity
- var- commodity
- viz- visa
- volumen- volume
- zefir- zephyr
Counts follow the officiality marks in Reta Vortaro (ReVo); the Academy of Esperanto keeps the official list in its Akademia Vortaro, and its own counts differ by a few roots. Words built from official roots are normal Esperanto even when they are not on any list: see Word building. Academy.