betrothed

The word 'betrothed' originates from the Middle English 'betrouthen', which itself is built upon the Old English concept of 'trēowth', meaning faith, truth, or a pledge. The prefix 'be-' intensifies the action, turning the noun 'troth' (a promise of fidelity) into a verb meaning "to pledge, to promise in marriage." The addition of the adjectival suffix '-ed' then creates a participle describing the state of having made such a solemn promise. Thus, the literal morphemic construction—"be" (thoroughly) + "troth" (pledge of truth) + "ed" (state of)—evolved from a concrete act of pledging one's faith into the modern abstract meaning of being formally bound by a promise of marriage.

Structure: be + troth + ed - be: Old English; a prefix used to form transitive verbs, often with an intensifying or completive sense. - troth: Middle English, from Old English 'trēowth'; meaning faithfulness, truth, a pledge or promise. - ed: Old English; a suffix forming adjectives from nouns or verbs, meaning "having, characterized by, or being in a state of."