Pent-up (adjective)

1. Held back or restrained, as emotions or energy.
2. Suppressed or repressed, as feelings or desires.

Origin:

From pent ("shut in, confined") + -up, form of the past participle of put.

Examples:

1. She felt pent-up anger and frustration.
2. He had pent-up emotions that he couldn't express.
3. The pent-up energy was released in a burst of activity.
4. She had pent-up desires that needed to be fulfilled.
5. The pent-up tension was palpable in the air.