In a manner relating to or characteristic of capillaries; by means of capillary action.
From capillary (Latin capillaris 'hair-like') plus the adverb-forming suffix -ly, which converts adjectives into adverbs describing how something happens or is done.
Water moves capillarily up plant roots and through soil—it's one of nature's cleverest tricks, where tiny tubes pull water upward against gravity through capillary action!
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