What is the origin of frugivorous?
The English adjective frugivorous “fruit-eating” is used mostly in biology to describe animals that eat fruit. The first element, frugi-, is a combining form of Latin frux “fruit, crops, produce” related to the verb fruī “to enjoy the fruits or products or results of.” From the form frūg- English has frugal and frugivorous. From fructus, the past participle of fruī (from an assumed frūguī), English has fruit (from Old French, from Latin frūctus) and fructify (from Old French fructifier, from Latin frūctificāre). The second element, -vorous, ultimately comes from Latin vorāre “to swallow ravenously,” whence English has devour (from Middle French devourer, from Latin dēvorāre “to swallow down,” and voracious (from Latin vorāc-, the stem of vorax “ravenous, insatiable.” Frugivorous entered English in the 18th century.