arrepentirse

Meaning

1. (reflexive) to regret
2. (reflexive) to repent

Hyphenated as

a‧rre‧pen‧tir‧se

Pronounced as (IPA)

/arepenˈtiɾse/

Etymology

From a- + Old Spanish repentirse, from Vulgar Latin *repaenitīre, from Late Latin paenitīre, from Classical Latin paenitēre.
The Old Spanish form with /t/ appears to have been influenced by Old French repentir or, less likely, Latin. The expected outcome with voiced /d/, namely rependirse, is also attested.
Compare Galician arrepentir, Portuguese arrepender.