unstring (verb) shake: upset deeply
Sinonime: appall,
bother, consternate,
daunt, discompose,
dismay,
distress,
disturb,
frighten, horrify,
impair,
intimidate, jar, knock props out, make waves,
move,
rattle,
throw, throw a curve,
undermine, unnerve, unsettle, unstring,
upset,
weaken,
worryAntonime: calm,
placate,
soothe