'avianize' originates from English, specifically from the adjective 'avian' plus the verb-forming suffix '-ize'; 'avian' itself comes from Latin 'avis' meaning 'bird'.

'avianize' was formed in modern English by adding the productive suffix '-ize' to 'avian' (itself from Latin 'avis'); the element 'avis' ('bird') passed into English via classical Latin borrowing as 'avian' and then became a basis for the verb 'avianize'.

Initially the root referred simply to 'bird' (Latin 'avis'); over time the adjective 'avian' meant 'of or relating to birds', and the derived verb 'avianize' came to mean 'to make or render birdlike' or 'to adapt for birds'.