Home › Words › U › upsproutupsproutupsprout means to sprout up.EtymologyFrom up- + sprout.verbTo sprout up.e.g.“To-day he felt upsprout / Purest desires, and he hearkened / To those profoundest, wisest whispers / That in the sane will not be hushed;” — 1883, George Henry Calvert, Sibyl, page 32:Definitions & examples from Wiktionary (CC BY-SA 3.0).