(transitive, archaic) To bind with a band or girdle; to gird.
1876, William Morris (translator), The Æneids of Virgil, London: Ellis & White, Book 5, line 364, p. 130,
Let him come forth to raise his arm with hide-begirded hand.
(transitive, archaic) To encircle, surround, as with a gird; enclose; encompass.
1717, Arthur Maynwaring (translator), Ovid’s Metamorphoses in Fifteen Books, London: Jacob Tonson, Book 5, “The Story of Perseus continu’d,” p. 148,
Perseus begirt, from all around they pour
Their Lances on him, a tempestuous Show’r,
Aim’d all at him […]