"Begone," to Shakespeare

• "___ thee, witch!": Shak.
• Shakespeare's word for "Get out!"

Douglas Harper's Etymology Dictionary Word definitions in Douglas Harper's Etymology Dictionary
intransitive verb, c.1600, used by Shakespeare (only in imperative: "begone!"), obsolete and of obscure origin. "[T]he subject of numerous conjectures, none of which can be said to have even a prima facie probability." [OED]

The Collaborative International Dictionary Word definitions in The Collaborative International Dictionary
Aroint \A*roint"\ ([.a]*roint"), interj. [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[=y]man to make room or way, fr. r[=u]m room. The final ...

Wiktionary Word definitions in Wiktionary
vb. (context archaic English) to dispel, to drive away