from The American Heritage® Dictionary of the English Language, 4th Edition
- adj. Not given expression; repressed: pent-up emotions.
from Wiktionary, Creative Commons Attribution/Share-Alike License
- adj. not expressed
- adj. repressed or suppressed, especially of emotions or impulses
from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
- adj. characterized by or showing the suppression of impulses or emotions
pent + up (Wiktionary)