An unpredictable person is one who is difficult to predict. They are not always calm or rational, and they can be very emotional.
He is a very unpredictable person, and it's hard to know what he is going to do next.
The weather is unpredictable, and it's hard to predict what is going to happen next.
adjective
not occurring at a regular rate or fixed intervals
Synonyms:
adjective
not capable of being foretold
adjective
unknown in advance
1
The weather is unpredictable.
2
It means the opposite of unpredictable.
3
His methods are unpredictable and incalculable.
4
He is fragile yet unpredictable.
5
The progression of disease is unpredictable and heterogeneous.
6
As the result the performance of new arbitrators is unpredictable.
7
In some cases, the meaning of the cislocative is unpredictable.
8
Such violence is injurious to the participants and unpredictably dangerous.
9
The rainfall is unpredictable in tune with the Indian monsoon.
10
The ultimate results of the election are still unpredictable.