'avianize' originates from Latin, specifically the adjective 'avianus' (from the noun 'avis'), where 'avis' meant 'bird', combined with the English/Latin suffix '-ize' (from Greek '-izein') meaning 'to make or to render'.

'avis' (Latin 'bird') led to 'avianus' (Latin, 'of birds'), which entered English as 'avian' in Modern English; the verb-forming suffix '-ize' was later attached to create 'avianize', and 'avianized' is the past/adjective form in modern usage.

Initially related to being 'of or pertaining to birds' (as in 'avian'); over time the verb-form 'to avianize' developed the sense 'to make or adapt something for birds,' and 'avianized' now commonly means 'made bird-like or adapted for birds.'