gnaw at/on sth
The dog gnawed at the bone for hours.
那条狗啃骨头啃了好几个小时。
啃；咬；啮
gnawed — past of gnaw
使烦恼；使焦虑；折磨；侵蚀；腐蚀；损耗；用牙齿咬或啃；被磨损或恶化
To bite or chew on something persistently, especially something tough.
To bite something persistently, especially something tough.
用牙齿咬或啃
bite or chew on with the teeth
To produce excessive anxiety or worry.
被磨损或恶化
become ground down or deteriorate
To corrode; to fret away; to waste.
一般现在时
The dog gnaws the bone.
狗啃骨头。
一般过去时
He gnawed his lip nervously.
他紧张地咬着嘴唇。
present progressive
She is gnawing on a pencil.
她在啃铅笔。
The puppy gnawed on the wooden leg of the chair.
小狗啃咬着椅子的木腿。
用法提示：动词过去式，表示物理性啃咬。
AI contextual example
Hunger gnaws at his stomach every day.
饥饿每天都在折磨着他的胃。
用法提示：动词第三人称单数，表示持续折磨或消耗。
AI contextual example
Guilt gnawed at him for years after the accident.
事故后的多年，内疚一直在折磨着他。
用法提示：动词过去式，比喻心理上的折磨。
AI contextual example
The dog gnawed at the bone for hours.
那条狗啃骨头啃了好几个小时。
直接接宾语时通常强调结果。
Rats had gnawed the wooden floorboards.
老鼠啃坏了木地板。
强调持续侵蚀的过程。
Acid is gnawing away at the metal pipes.
酸正在腐蚀金属管道。
比喻用法，指心理上的折磨。
Guilt gnawed at him for years after the accident.
事故后的愧疚折磨了他多年。
强调用牙齿反复咀嚼，常与 on 搭配；但不像 gnaw 那样含有逐渐啃掉或磨损的结果。
强调咬这个动作，通常是一次性的；表“啃咬”需加 on 等介词，且无持久啃磨的含义。
指小口、轻咬，动作幅度小，不含用力啃掉硬物的意思，语气比 gnaw 轻。
非正式，强调大声、用力地咀嚼，常带拟声色彩，不如 gnaw 正式。
指津津有味或嘎吱嘎吱地吃，通常用于食物，不强调啃咬硬物或使其磨损。
grammar · medium
易错句子The mouse gnawed the piece of cheese and ran away.
正确表达The mouse bit the piece of cheese and ran away.
动词gnaw表示反复啃咬，而bite表示一次性咬。中文的'咬'可以涵盖两者，但英文需要区分动作的持续性。
grammar · medium
易错句子The guilty feeling gnawed him all day.
正确表达The guilty feeling gnawed at him all day.
当gnaw表示'折磨'这一比喻义时，必须使用介词at或on，不能直接跟宾语。这是动词搭配规则。
针对 gnaw 表示“（焦虑、担忧等）不断折磨、使烦恼”的动词义项；其反义词侧重“使安心”。gnaw 的“啃咬”“侵蚀”义项无直接反义词。
咬住并咀嚼，而gnaw强调啃咬并逐渐侵蚀或咬下小块
用力咬住或咬断，而gnaw是持续啃咬，通常指小口反复啃
轻轻小口咬，而gnaw是较用力地啃，常常是长时间啃硬物
啃咬（某物）
The dog gnawed on a bone in the yard.
狗在院子里啃着一根骨头。
咬穿；咬断
The rat gnawed through the power cable.
老鼠咬穿了电源线。
折磨；使持续焦虑
The guilt gnawed at him for years.
内疚折磨了他多年。
挥之不去的焦虑感
She couldn't shake the gnawing feeling that something was wrong.
她无法摆脱那种出了问题的挥之不去的焦虑感。
阵阵袭来的饥饿感；饿得难受
After the long hike, a gnawing hunger set in.
长途徒步之后，一阵饥饿感袭来。
gnaw + -ing
gnaw + -er
gnaw + -ing + -ly
gnaw + at
gnaw + away
gnaw + through
折磨；使烦恼
The anxiety was gnawing at him all day.
这种焦虑折磨了他一整天。
逐渐侵蚀；不断损害
Stress can gnaw away at your health over time.
压力会逐渐侵蚀你的健康。
使良心不安
The lie he told gnawed at his conscience for years.
他撒的谎使他的良心不安了好几年。
Dictionary facts from ECDICT, OCTANOVE, WIKTIONARY, WORDNET.