prop [sth/sb] upvtr phrasal sepphrasal verb, transitive, separable: Verb with adverb(s) or preposition(s), having special meaning, divisible--for example, "call off" [=cancel], "call the game off," "call off the game."
(support, steady)
支撑,撑起
支持,扶持
She propped up her book to keep her hands free for knitting.