(third-person singular simple present dreaves, present participle dreaving, simple past and past participle dreft or dreaved)
From Middle English dreven, from Old English drǣfan (“to drive, drive out, expel”), from Proto-Germanic *draibijaną (“to cause to drive”), from Proto-Indo-European *dʰreibʰ- (“to drive, push”). Cognate with Icelandic dreifa (“to spread out, disperse”). More at drive.
From Middle English draf, from Old English drāf (“a drove, herd”). More at drove.