Webster's Revised Unabridged Dictionary · 1913

Needs

Needs , adverb

[Orig. gen. of need, used as an adverb. Compare -wards.]

Of necessity; necessarily; indispensably; -- often with must, and equivalent to of need.
A man must needs love mauger his head. — Chaucer
And he must needs go through Samaria. — John iv. 4
He would needs know the cause of his repulse. — Sir J. Davies