infidelity
UK: ˌɪnfɪˈdɛlɪti | US: ˌɪnfɪˈdɛləti
n. 1. The action or state of being unfaithful to a spouse or partner.
n. 2. Disloyalty to a moral obligation, principle, or belief.
n. 3. Lack of religious faith; unbelief (archaic).
infidelity = in<not> + fid<faith> + elity<noun suffix>
- in-: Prefix meaning "not" (from Latin in-).
- fid: Root meaning "faith" (from Latin fides).
- -elity: Noun-forming suffix (variant of -ity, from Latin -itas).
Etymology Origin:
The word infidelity traces back to Latin infidelitas, combining in- (negation) + fides (faith). Originally, it referred to religious disbelief (e.g., rejecting Christianity). Over time, it broadened to include marital disloyalty (16th century) and general betrayal. The root fid appears in related words like fidelity (faithfulness) and confide (to trust). The shift from theological to interpersonal contexts reflects societal emphasis on trust in relationships.
His infidelity shattered their marriage.
The politician’s infidelity to his promises angered voters.
In medieval times, infidelity was often punished severely.
She forgave his infidelity but never forgot it.
The novel explores themes of love, betrayal, and infidelity.