paeniteo

Etymology
Perhaps related to and to, meaning lack/shortage/dissatisfaction.

Verb

 * 1) to cause to repent
 * 2) to regret, repent; to be sorry
 * 3)   to regret
 * 4) * 59 , Cicero, Epistulae ad Atticum 2.23.2:
 * Prīmum igitur illud tē scīre volō, Sampsiceramum, nostrum amīcum, vehementer suī stātūs paenitēre restituīque in eum locum cupere ex quō dēcidit.
 * First then I want you to know that our friend Sampsiceramus [Pompey] is bitterly unhappy about his position and longs to get back to where he stood before his fall.