1 bite, chew, munch, nibble, worry
2 consume, devour, eat away or into, erode, fret, wear away or down
3 distress, fret, harry, haunt, nag, plague, prey on one's mind, trouble, worry
English Collins Dictionary - English synonyms & Thesaurus
gnaw ( gnaws 3rd person present) ( gnawing present participle) ( gnawed past tense & past participle )
1 verb If people or animals gnaw something or gnawat it, they bite it repeatedly.
Woodlice attack living plants and gnaw at the stems... V at/on n
Melanie gnawed a long, painted fingernail. V n
2 verb If a feeling or thought gnaws at you, it causes you to keep worrying.
Doubts were already gnawing away at the back of his mind... V at n
Mary Ann's exhilaration gave way to gnawing fear. V-ing
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