improbable
/impɾoˈbable/ · B2 · adj
improbable, unlikely
🎲 im- (not) + probable (likely) = not likely, like Spanish probar, to prove
Improbable is im- (not) plus probable, from Latin probabilis, meaning provable or credible. Something improbable is hard to prove or believe will happen. The English word is nearly identical, with Spanish stress on the last syllable: im-pro-BA-ble.