adjective

unacceptable

unacceptable

His behavior was completely unacceptable.

His behaviour was completely unacceptable.

This level of service is unacceptable.

This level of service is unacceptable.

((sth.)) is unacceptable something is not satisfactory The quality of the product is unacceptable.

Synonyms: intolerable, unsatisfactory; Antonyms: acceptable, satisfactory

From 'un-' (not) + 'accept' + '-able' (capable of being). It means 'not capable of being accepted'.

Break it down: 'un-accept-able' means something is not good enough to be accepted.

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