1. 動詞
   不及物動詞:
   磨擦
   皮膚等: 擦傷|擦破, 擦痛
   (衣服等)磨損
   及物動詞:
   磨擦...(物)
   擦...(物)
   搓...(物)
   揉...(物)
   使...(兩樣物)相擦
   

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   同義字詞
   abrade,chafe,corrade,erode,fray,frazzle,fret,gall,rasp,wear
   buff,file,grind,hone,rasp,sand
   buff,burnish,dress,furbish,gloss,grind,polish,shine,smooth
   

2. 名詞
   限定單數可數名詞a rub:
   擦, 摩擦
   按摩
   表面的磨損
   限定不可數名詞:
   磨損處, 擦痛處
   嘲諷
   限定單數the rub:
   阻難, 障礙
   疑難點, 困難
   

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   同義字詞
   aggravation,annoyance,bother,bugbear,exasperation,frustration,hassle,headache,inconvenience,irk,irritant,nuisance,peeve,pest,ruffle,thorn,trial,vexation
   

例句

1. Aye, there's the rub .
2. What, eat it or rub it in?
3. It's gonna rub off on you.
4. And there's the rub , I think.
5. The bump may rub on the shoes.
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