Adulteress
/əˈdʌltərəs/
Definition 1 of 1
Pro Tip 1/3Negative Connotation
The word 'adulteress' has a negative and judgmental tone, implying moral disapproval. 
When the news of her being an adulteress spread, she faced social ostracism.
Pro Tip 2/3Gender Specific
'Adulteress' is specific to women; the male equivalent is 'adulterer'. 
The story revolved around the adulteress and her accomplice, the adulterer.
Pro Tip 3/3Historical Usage
'Adulteress' is less common today and can sound archaic; modern language often uses 'cheating' or 'unfaithful' instead. 
Historical texts often punished the adulteress more harshly than the adulterer.