noun (plural of perfidiosity) as in strong fondness

Strongest matches

fidelity, faithfulness, trustworthiness

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Example Sentences

Example:She was praised for her unwavering fidelity to her partner.

Definition:loyalty to a person or to a duty or trust; sometimes involves a bond of sexual exclusivity

From fidelity

Example:Their marriage was based on unshakeable faithfulness.

Definition:the quality of being faithful; the quality of showing devotion to one's partner or cause; the quality of staying loyal to a person, a promise, or a principle

From faithfulness

Example:She was always praised for her trustworthiness.

Definition:the quality of being honest and having strong moral principles; the ability to be relied on and the ability to be depended on to do what is right

From trustworthiness