plural infidelities
Definition of infidelity
1a
: the act or fact of having a romantic or sexual relationship with someone other than one's husband, wife, or partner
b
: unfaithfulness to a moral obligation : disloyalty
2
: lack of belief in a religion
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Merriam-Webster unabridged
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Time Traveler for infidelity
The first known use of infidelity was in the 15th century
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