Webster's Revised Unabridged Dictionary · 1913

Pent

Pent (pent) , past participle and adjective

[From Pen, transitive verb]

Penned or shut up; confined; -- often with up.
Here in the body pent. — J. Montgomery
No pent-up Utica contracts your powers. — J. M. Sewall

pent- (pent) , prefix

Same as penta-; -- used as a combining form before vowels, as in pentoxide.