'asymmetrical-jawed' is a modern English compound formed from 'asymmetrical' + 'jawed', used to describe a jaw that lacks symmetry.

'asymmetrical' originates from Greek 'asymmetria' (via Late Latin/Medieval Latin), where the prefix 'a-' meant 'not' and 'symmetria' meant 'measured proportion'; 'jaw' originates from Old English (e.g. 'ceaf') meaning the mouth/cheek area and developed into Modern English 'jaw', with '-ed' added to form an adjectival compound.

Initially, 'asymmetrical' meant 'not symmetrical' in a general geometric or balanced sense, and 'jaw' referred to the mouth/cheek area; together in modern usage they specifically denote an unevenness of the jaw structure.