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"male duck," c.1300, unrecorded in Old English but may have existed then, from West Germanic *drako (cf. Low German drake, second element of Old High German anutrehho, dialectal German Drache).
archaic for "dragon," from Old English draca "dragon, sea monster, huge serpent," from Proto-Germanic *drako (cf. Middle Dutch and Old Frisian drake, Dutch draak, Old High German trahho, German drache), an early borrowing from Latin draco (see dragon).