In a pure, modest, or virtuous manner; with sexual restraint and moral propriety.
From Middle English 'chaste,' derived from Old French 'chaste,' from Latin 'castus' (pure, clean). The '-ly' suffix transforms the adjective into an adverb describing the manner of an action.
The word 'chaste' comes from the same Latin root as 'caste' (as in the Indian caste system), both originally referring to social categories of purity and separation in ancient societies.
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