How to Say "cheater" in Spanish
The Spanish word for “cheater” is “infiel” — B1 level.
English → SpanishB1
nounB1
romantic betrayal

Examples
Ella descubrió que él era un infiel.
She discovered that he was a cheater.
En la antigüedad, llamaban infieles a los que no compartían su religión.
In ancient times, they called those who didn't share their religion infidels.
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