From: MERRIAM WEBSTER
: shut up : confined, repressed
a pent crowd
pent-up feelings
pent-up feelings
a pent-up emotion is a strong feeling that you do not express and that gradually becomes more difficult to control
intransitive verb
: to turn from sin and dedicate oneself to the amendment of one's life
: to feel regret or contrition: to change one's mind
transitive verb
: to cause to feel regret or contrition
: to feel sorrow, regret, or contrition for
Question: Is repent a made up word just for a religion? Do your own research.