Unpredictable behavior refers to actions or reactions that are difficult to anticipate or forecast. This behavior can be erratic, inconsistent, or changeable, making it challenging to foresee how a person may behave in a given situation.
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Erratic or unpredictable in behaviour or direction
The word "erratic" is an adjective. It is used to describe something that is unpredictable or irregular in behavior or movement.
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A person who suffers from erratic behavior, as in Bipolar Disorder.
It means lack of stability. The state of being unstable. Or tendency to unpredictable behavior or erratic changes of mood. She showed increasing signs of mental instability.
arbitrary, fickle, changeful, erratic, impulsivemoody, unstable, careless, unpredictable
If an individual displays erratic behavior, they might be described as unpredictable. This individual might behave very differently from one day to the next. People might find it difficult to guess how the person might react to a particular situation, because the person had varying responses in the past to similar situations.
Loose CannonSomeone who is unpredictable can be referred to as a wild card. Also, the term loose cannon is occasionally used, though that usually carries a meaning of being quick to anger as well.