Alexander Dyce, A General Glossary to Shakespeare's Works

boot profit, gain, something added: “with boot,” MEASURE FOR MEASURE, ii. 4. 11 ; KING LEAR, v. 3. 301; “it is no boot” THE TAMING OF THE SHREW, v. 2. 176 (it is of no avail);1 Henry VI., iv. 6. 52; “Grace to boot” THE WINTER'S TALE, i. 2. 80 (over and above, in addition); “there's some boot” THE WINTER'S TALE, iv. 4. 627 ( “something over and above,” JOHNSON) ; “without boot! what a boot is here,” THE WINTER'S TALE, iv. 4. 665 ; “there is no boot” RICHARD II., i. 1. 164 ; ( “no advantage, no use, in delay or refusal,” JOHNSON ), “make boot of this,” 2 HENRY VI., iv. 1. 13 ; “Young York he is but boot” RICHARD III., iv. 4. 65 ; ( “that which is thrown in,” JOHNSON , a make-weight). “Saint George to boot” RICHARD III., v. 3. 301 (over and above, in addition); “Make boot of his distraction,” ANTONY AND CLEOPATRA, iv. 1. 9. (In the passages, Grace to boot and Saint George to boot, Malone explains to boot by “to help.”)