incumbent

From Latin incumbentem + English -ent (suffix denoting the causing, doing, or promoting of an action). Incumbentem is the accusative singular of incumbēns (“reclining”), the present active participle of incumbō (“to lay upon, to lean or recline on; to fall upon, to press down on”), from in- (prefix meaning ‘against; into; on, upon’) + *cumbō (“to lie down, recline”) (ultimately from Proto-Indo-European *ḱewb-).