"Bent back; = recurved", Mid 16th cent.; earliest use found in Thomas Hill (b. c1528). From classical Latin recurvātus, past participle of recurvāre.[recurvate etymology, recurvate origin, 英语词源]
"To turn back; = recurve", Late 16th cent. From classical Latin recurvāt-, past participial stem of recurvāre recurve. Compare earlier recurvate, and also recurve and recurvation.