ARO’YNT. adv. [a word of uncertain etymology, but very ancient
use.] Be gone; away: a word of expulsion, or avoiding.
Saint Withold footed thrice the wold,
He met the night-mare, and her name told,
Bid her alight, and her troth plight,
And aroynt thee, witch, aroynt thee right. Shak. King Lear.
[it seems derived from ye Fr. rogneux, or qui a la rogne a paltry, mangy fellow]