Synonyms of 'pent-up'
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If you say that someone is inhibited, you mean they find it difficult to behave naturally and show their feelings, and that you think this is a bad thing.
Men are more inhibited about touching each other than women are.
Thesaurus for pent-up from the Collins English Thesaurus
Pent-up emotions , energies, or forces have been held back and not expressed, used, or released.