What does aroint mean?
The definition of aroint
A*roint”, interj.
Etym: [Cf. Prov. E. rynt, rynt thee, roynt, or runt, terms used by milkmaids to a cow that has been milked, in order to drive her away, to make room for others; AS. r to make room or way, fr. r room. The final t is perh. for ta, for thou. Cf. Room space.]

Stand off, or begone. [Obs.] Aroint thee, witch, the rump-fed ronyon cries. Shak.

A*roint”, v. t.
To drive or scare off by some exclamation. [R.] “Whiskered cats arointed flee.” Mrs. Browning.