gyrfalcon

The word 'gyrfalcon' entered English in the early 14th century from the Old French 'gerfaucon'. The Old French term is believed to be a compound, though its exact origins are debated. The most plausible theory suggests the first part, 'ger-', derives from a Germanic root meaning 'spear' (related to Old High German 'gēr'), perhaps alluding to the bird's swift, piercing flight. The second part, '-faucon', is from Late Latin 'falco', meaning 'falcon'. Thus, the name's literal logic paints a picture of a 'spear-falcon', a fitting description for this formidable bird of prey. Over centuries, the spelling was anglicized to 'gyrfalcon', obscuring its original components while retaining its specific ornithological meaning.

This word is a loanword from Old French, where it was already a fused unit. It is not productively segmentable into meaningful morphemes in modern English based on its current spelling.