Definition of "nill"

I here auow thee neuer to forſake. / Ill weares he armes, that nill them vſe for Ladies ſake.

1590, Edmund Spenser, “Book III, Canto V”, in The Faerie Queene. […], London: […] [John Wolfe] for William Ponsonbie, page 465

What I nill tell, you aske (quoth ſhe) in vaine, / Nor mou’d by praier, nor conſtraind by powre […]

1600, [Torquato Tasso], “The Twelfth Booke of Godfrey of Bulloigne”, in Edward Fairefax [i.e., Edward Fairfax], transl., Godfrey of Bulloigne, or The Recouerie of Ierusalem. […], London: […] Ar[nold] Hatfield, for I[saac] Iaggard and M[atthew] Lownes, stanza 61, page 225

I must indeed abide the Doom of Men, whether I will or I nill: […]

1955 October 20, J[ohn] R[onald] R[euel] Tolkien, “Appendix A”, in The Return of the King: Being the Third Part of The Lord of the Rings […], New York, N.Y.: Ballantine Books, published December 1978, page 427

Certes (ſayd he) I n’ill thine offred grace, / Ne to be made ſo happy doe intend […].

1590, Edmund Spenser, “Book II, Canto VII”, in The Faerie Queene. […], London: […] [John Wolfe] for William Ponsonbie, page 280