In a manner resembling or relating to darning; in a way characterized by mending or patching.
From 'darn' + '-ly' adverbial suffix. Formed in the typical English pattern of converting adjectives and nouns to adverbs to describe how something is done.
This is an almost vanishingly rare word because it describes something we don't really do or talk about anymore—how many times do you need an adverb for 'in a darning-like way'? It's a linguistic artifact of a more textile-focused culture.
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