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1. Oxford American Dictionary

   gnaw

   • IPA[nô]

   美式

   • v.
     bite at or nibble something persistently；bite at or nibble (something)

   • verb: gnaw, 3rd person present: gnaws, gerund or present participle: gnawing, past tense: gnawed, past participle: gnawed

2. • 釋義

   v.

   動詞

   • 1. bite at or nibble something persistently watching a dog gnaw at a big bone 同義詞 chew, bite, nibble, munch, crunch, ... 更多champ, chomp, masticate, worry, tear, raremanducate, chumble
   • ▪ bite at or nibble (something) she sat gnawing her underlip 同義詞 erode, wear away, wear down, eat away (at), chip away (at), ... 更多bite into, corrode, consume, devour, rarefret
   • 2. cause persistent and wearing distress or anxiety the doubts continued to gnaw at me 同義詞 prey on someone's mind, nag, plague, torment, torture, ... 更多trouble, distress, worry, haunt, oppress, weigh heavily on someone's mind, be a weight on someone's mind, burden, hang over, harry, bother, exercise, fret, niggle, rankle with, fester