transcription, транскрипция: [ ʌnpɑ:(r)dənəb(ə)l ]
If you say that someone’s behaviour is unpardonable , you mean that it is very wrong or offensive, and completely unacceptable.
...an unpardonable lack of discipline...
I must ask a question you may find unpardonable.
= unforgivable, inexcusable
ADJ