Fly — From Old English to English | etymologist.ai
fly
/flaɪ/·verb·before 900 CE·Established
Origin
From PIE *plew- (to flow, float, fly) — a root that made no distinction between air and water movement, also giving Latin 'pluvia' (rain).
Definition
To move through the air using wings; to travel through the air in an aircraft; to move or be hurled quickly through the air.
The Full Story
Old Englishbefore 900 CEwell-attested
From OldEnglish 'flēogan' (to fly, take flight, flee through the air), from Proto-Germanic *fleuganą (to fly), from PIE root *plew- (to flow, float, swim, fly). The PIE root *plew- reveals that ancient speakers did not sharply distinguish between moving through air and moving through water — both were conceived as flowing through a fluid medium. This sameroot gave Latin
Did you know?
English 'fly,' Latin 'pluvia' (rain), and Greek 'plein' (to sail) all come from the same PIE root *plew- (to flow) — revealing that prehistoric speakers saw flying, raining, and sailing as the same basic act: moving through a fluid. The insect 'fly' gets its name from the verb, not the other way around.
) and the causative 'flȳgan/flēgan' (to put to flight), though Modern English merged them. The noun 'fly' (the insect) derives from the same verb — the creature named for its defining action. Key roots: *plew- (Proto-Indo-European: "to flow, float, swim, fly").