Translation guide
The English phrase "cheating heart" refers to a person's tendency to be unfaithful in romantic relationships, or the emotional state of being unfaithful. In Japanese, this concept is expressed through various words and phrases describing infidelity, unfaithfulness, or a wandering heart.
We broke up because of his cheating heart.
Describes a person who is prone to cheating by nature; a philandering disposition.
I can't trust her because she has a cheating heart.
A formal or literary term for infidelity or unchastity, often used in legal or serious contexts.
Those who harbor a cheating heart cannot find happiness.
Emphasizing the restless, easily distracted nature of romantic feelings.
Literally 'one's heart moves/shifts', meaning to transfer one's affections to another person.
His cheating heart means he never stays with one person for long.
Fickleness or capriciousness in love; a tendency to easily change romantic interests.
Focusing on the behavior rather than the disposition.
The most common word for cheating or having an affair. Can be used as a noun or suru-verb.
I will never forgive a cheating heart.
Adultery, specifically referring to extramarital affairs. More serious and often used in legal or social contexts.
浮気 (uwaki) is a general term for cheating, including casual flings or emotional affairs, and can apply to unmarried couples. 不倫 (furin) specifically means adultery, i.e., cheating within a marriage, and carries a heavier social stigma.
While 浮気心 is a direct translation, it is not as commonly used as the standalone 浮気. In many contexts, simply saying 浮気する人 (a person who cheats) or 浮気性 (cheating disposition) is more natural.
移り気な人とは付き合いたくない。
I don't want to date someone with a cheating heart.
A change of heart, often implying unfaithfulness or loss of interest in a partner.
I had noticed his cheating heart.
不倫関係がバレて離婚した。
The cheating heart led to divorce when the affair was exposed.