Dutch word oprapen comes from Dutch rapen ((transitive) to gather, to pick up.), Dutch op

Detailed word origin of oprapen

Dictionary entry	Language	Definition
rapen	Dutch (nld)	(transitive) to gather, to pick up.
op	Dutch (nld)	(postpositional) onto, up onto. Up Up, all gone, no more, finished. Up, awake, out of bed (op ... na, with a cardinal number) bar, except Used to form ordinal numbers in relation to a superlative quality. The number that is used is 1 lower than in the English translation.. On, upon.
oprapen	Dutch (nld)	To pick up from the ground or floor.