'aviational' originates from English, specifically formed from the noun 'aviation' + the adjectival suffix '-al'. 'Aviation' itself comes from French 'aviation', ultimately from Latin 'avis' meaning 'bird'.

'aviational' developed when the English noun 'aviation' (from French 'aviation') acquired the suffix '-al' to form an adjective; 'aviation' traces back to Latin 'avis' ('bird') via French.

Initially related to the concept of flight (from Latin 'avis' = 'bird') and to the act of flying; over time it came to refer specifically to human flight and aircraft activities, and 'aviational' now means 'relating to aviation'.