hirsute [ˈhɜrsut] a.
1.) Having rough or shaggy hair; hairy, shaggy.
2.) Bot. and Zool. Covered with long and stiffish hairs.
3.) Of or pertaining to hair; of the nature of or consisting of hair.
4.) transf. and fig. Rough, shaggy; untrimmed. Of manners or style: Rough, unpolished (O.E.D. 2nd Ed.).
Etymology: Latin hirsutus, hairy, bristly.
"Juan, I said, was a most beauteous boy,
And had retain'd his boyish look beyond
The usual hirsute seasons which destroy,
With beards and whiskers, and the like, the fond
Parisian aspect which upset old Troy" (Don Juan, George Byron, 1819).
For those occasions when you need to use the word "hairy" in an essay but don't want to lower the tone.