Webster's Revised Unabridged Dictionary · 1913

Hairy

Hairy (-y) , adjective

1.
Bearing or covered with hair; made of or resembling hair; rough with hair; hirsute.
His mantle hairy, and his bonnet sedge. — Milton
2.
Very complicated, difficult, or involved; as, a hairy problem; a hairy equation. [Colloquial]
3.
Dangerous or frightening; as, a hairy encounter with a mugger.