Myl

According to the Old English Dictionary:

myl

dust :-- Ðát ðære ylcan stówe myl wið fýre wæs freomigende ut pulvis loci illius contra ignem voluerit, Bd. 3, 10, tit. ; S. 534, 16. [Prompt. Parv. mul pulvis, p. 348, and note. Cf. Icel. mylja to crush.] myl