← DefinitionshareGuessunpredictableadjectiveNot able to be known or guessed in advance; likely to change suddenly and unexpectedly.nounA person or thing that is not predictable; something that behaves in an unexpected way.SynonymsvolatileadjectiveerraticadjectiveunreliableadjectivefickleadjectiveAntonymspredictableadjectiveconsistentadjective