Webster's Revised Unabridged Dictionary · 1913

Frazzle

Frazzle , transitive verb

[Compare German faseln, and English fray.]

To fray; to wear or pull into tatters or tag ends; to tatter; -- used literally and figuratively. [Provincial English & United States]
Her hair was of a reddish gray color, and its frazzled and tangled condition suggested that the woman had recently passed through a period of extreme excitement. — J. C. Harris

Frazzle , noun

1.
The act or result of frazzling; the condition or quality of being frazzled; the tag end; a frayed-out end. [Provincial English & United States]
My fingers are all scratched to frazzles. — Kipling
2.
a state of extreme exhaustion; -- often used in the phrase worn to a frazzle.
Gordon had sent word to Lee that he “had fought his corps to a frazzle.” — Nicolay & Hay (Life of Lincoln)