In a manner that shows recognition and valuing of something's worth.
From appreciatory + -ily suffix (converts adjectives to adverbs). This is a doubly-suffixed word: appreciate + -ory + -ily, building toward an adverbial form. The -ily ending follows Old English patterns for creating manner adverbs.
This word is so rare it barely appears in modern texts—it's a linguistic 'fossil' showing how English could theoretically stack suffixes forever, but speakers eventually choose simpler alternatives like 'appreciatively' instead!
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