The building blocks of English

Affixes

-acious

Also ‑acity.

Inclined to, given to, or having as a capacity.

Originally and mainly from Latin words in ‑ax or ‑ac‑, plus ‑ous.

Words in ‑acious are adjectives. Words ending in ‑acity are corresponding nouns of quality or state (audacity, sagacity).

Examples of words in -acious
All examples derive from Latin.

audacious

willing to take risks

audax, bold

capacious

having a lot of space inside, roomy

capax, capac‑, capable

efficacious

successful in producing a desired result

efficax, from efficere, to accomplish

loquacious

talkative

loquax, from loqui, talk

mendacious

not telling the truth

mendax, lying, related to mendum, a fault

pertinacious

holding firmly to an opinion or a course of action

pertinax, holding fast

pugnacious

eager or quick to argue or fight

pugnax, from pugnare, to fight

rapacious

aggressively greedy or grasping

rapax, from rapere, to snatch

sagacious

showing good judgement

sagax, wise

tenacious

holding fast to something, not easily giving up

tenax, from tenere, to hold

veracious

speaking or representing the truth

verax, from verus, true

vivacious

attractively lively and animated

vivax, lively or vigorous, from vivere, to live

voracious

wanting or devouring great quantities of food

vorax, from vorare, to devour