Heavily
来自Big Physics
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Old English hefig, of Germanic origin; related to Dutch hevig, also to heave.
wiktionary
From Middle English hevely, hevyliche, from Old English hefiġlīċe(“heavily; grievously”), equivalent to heavy + -ly.
etymonline
heavily (adv.)
Old English hefiglice "violently, intensely; sorrowfully; sluggishly," from hefig (see heavy (adj.)) + -ly (2). Meaning "with much weight" is from early 14c.
