transcription, транскрипция: [ ɪnsəpɔ:(r)təb(ə)l ]
If you say that something is insupportable , you mean that it cannot be coped with or accepted. ( FORMAL )
Too much spending on rearmament would place an insupportable burden on the nation’s productive capacity...
Life without Anna had no savour, was tedious, insupportable.
= intolerable
ADJ