In a satisfied, peaceful, and happy manner; showing contentment and acceptance of one's situation.
From 'content' (meaning satisfied) plus -ly (adverbial suffix). The word directly transforms the adjective form into an adverb describing how an action is performed.
The difference between 'contently' and 'happily' is subtle but real—someone might smile 'happily' at good news, but a farmer might sit 'contently' watching the rain after drought, suggesting deeper satisfaction.
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