Loudly
来自Big Physics
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Old English hlūd, of West Germanic origin; related to Dutch luid, German laut, from an Indo-European root meaning ‘hear’, shared by Greek kluein ‘hear’, klutos ‘famous’ and Latin cluere ‘be famous’.
wiktionary
From Middle English loudly, equivalent to loud + -ly.
etymonline
loudly (adv.)
c. 1400, from loud + -ly (2).
