Synonyms of unpredictable in English:

unpredictable


See definition of unpredictable

adjective

1‘the unpredictable results of the first-past-the-post system’

SYNONYMS

unforeseeable, undivinable, incalculable, uncertain, unsure, doubtful, dubious, in the balance, up in the air, random, arbitrary

informal iffy, hit and miss

ANTONYMS

predictable

2‘the men in here are unpredictable, violent, and dangerous’

SYNONYMS

erratic, moody, volatile, unstable, fickle, capricious, whimsical, temperamental, mercurial, changeable, variable, inconstant, undependable, unreliable, unmanageable, impulsive

ANTONYMS

predictable, reliable