PIE*we, blow, 語源的にはventilate, wingから。
wind ワインディング。PIE*wendhの「曲げる」「回す」「ねじる」から。PIE*weiの拡大形で、語源的にはつる植物、ベッチ。
I have forgot much, Cynara! gone with the wind. [Ernest Dowson, 1896]Meaning "breath" is attested from late Old English; especially "breath in speaking" (early 14c.), so long-winded, also "easy or regular breathing" (early 14c.), hence second wind in the figurative sense (by 1830), an image from the sport of hunting.