Webster's Revised Unabridged Dictionary · 1913

Whit

Whit , noun

[Old English wight, wiht, Anglo-Saxon wiht a creature, a thing. See Wight, and compare Aught, Naught.]

The smallest part or particle imaginable; a bit; a jot; an iota; -- generally used in an adverbial phrase in a negative sentence.
Samuel told him every whit. — 1 Sam. iii. 18
Every whit as great. — South
So shall I no whit be behind in duty. — Shakespeare
It does not me a whit displease. — Cowley