unpredictable
un|pre|dict|able /'ʌnprɪd'ɪktəbəl/
[ADJ]
If you describe someone or something as unpredictable, you mean that you cannot tell what they are going to do or how they are going to behave.
He is utterly unpredictable.
...Britain's notoriously unpredictable weather.
≠ predictable
● unpredictably [ADV] usu ADV with v, ADV adj
Monthly costs can rise or fall unpredictably.
...her husband's unpredictably violent behavior to others.
● unpredictability [N-UNCOUNT] oft with poss
...the unpredictability of the weather.
[ADJ]
If you describe someone or something as unpredictable, you mean that you cannot tell what they are going to do or how they are going to behave.
He is utterly unpredictable.
...Britain's notoriously unpredictable weather.
≠ predictable
● unpredictably [ADV] usu ADV with v, ADV adj
Monthly costs can rise or fall unpredictably.
...her husband's unpredictably violent behavior to others.
● unpredictability [N-UNCOUNT] oft with poss
...the unpredictability of the weather.