In a manner relating to or characterized by the quality of being late or untimely (archaic usage).
From Old English and Germanic roots related to 'late,' this archaic adverb formation uses the -ly suffix to create an adverbial form describing temporal characteristics.
This word is basically extinct now, replaced by 'lately' and 'late'—it's a perfect example of how English constantly shuffles its vocabulary, dropping old words that feel awkward.
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