"constipated, suffering from retention of hard fecal matter in the bowels," c. 1400, from Old French costivé, from Latin constipatus, past participle of constipare (see constipation). Figurative sense of "slow in action" is attested from 1590s. Related: Costively; costiveness.
costal
co-star
costard
cost-effective
costermonger
costive
costly
costume
costumier
cosy
cot