Unpredictable
Synonyms Erratic, Variable, Inconsistent, Capricious, Spontaneous, Fickle, Random, Tumultuous, Irregular, Hazardous, Uncertain, Changeable, Whimsical, Impulsive, Unreliable, Mercurial, Fluctuating, Volatile, Chaotic, and Unforeseen.
Example Sentences
Weather can be very unpredictable sometimes.
His moods are often unpredictable and confusing.
Life events can be unpredictable and surprising.
Unpredictable changes can disrupt our plans.