The Collaborative International Dictionary of English v.0.48:
Repent \Re*pent"\ (r?-p?nt"), v. i. [imp. & p. p. Repented; p.
pr. & vb. n. Repenting.] [F. se repentir; L. pref. re- re-
+ poenitere to make repent, poenitet me it repents me, I
repent. See Penitent.]
1. To feel pain, sorrow, or regret, for what one has done or
omitted to do.
First she relents
With pity; of that pity then repents. --Dryden.
2. To change the mind, or the course of conduct, on account
of regret or dissatisfaction.
Lest, peradventure, the people repent when they see
war, and they return to Egypt. --Ex. xiii.
3. (Theol.) To be sorry for sin as morally evil, and to seek
forgiveness; to cease to love and practice sin.
Except ye repent, ye shall likewise perish. --Luke