Third person singular present tense of enchain; binds or confines with chains or restrictions.
From enchain with the third person singular -s ending. This simple conjugation allows the verb to be used in present tense narrative or description.
The phrase 'Duty enchains him' was common in older literature, and it shows how English verbs used to be more active—'enchains' doesn't just say he's trapped, it makes duty sound like an active force doing the chaining.
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