become stale (verb) wither: droop, decline
Detalii: whither is an adverb meaning 'to what place' or a conjunction meaning 'to which place or condition'; wither is a verb meaning 'to dry up or shrivel'
Sinonime: brush up, brush up on, cram, drum, get up, grind away, mug up, polish up, read up, refresh the memory, review, study, swot up
Antonime: bloom,
grow