IPA: //ʌnˈlɪsənəbl//
KK: /ʌnˈlɪsənəbl/
Describing something that is difficult or impossible to listen to with enjoyment or comfort.
The music was so chaotic that it was completely unlistenable.
Comparative: more unlistenable
Superlative: most unlistenable
Unlistenable → It is formed from "un-" (meaning not) and "listenable" (from "listen" (from Old English *hlysnan*, meaning to hear) and "-able" (meaning capable of)). The word "unlistenable" means not capable of being listened to or difficult to hear.
Think of 'not' ('un-') being added to 'capable of being heard' ('listenable') — that's why unlistenable means something that is hard to listen to.