Know which is which Meaning in English
expression
Definição
To be able to tell two or more similar people or things apart; to know the difference between them.
Uso & Nuances
Often used when two or more things are very similar and easily confused (like twins, two keys, or bottles). Common in spoken English, both formal and informal. Typically appears as 'can/can't know which is which'. You rarely use it for more than two things.
Frases de Exemplo
These apples look so similar, I can't know which is which.
basic
The twins dress alike, so it's hard to know which is which.
basic
If you mix up the bottles, you won't know which is which.
basic
After labeling the keys, now I finally know which is which.
natural
Honestly, with those new uniforms, I can't know which is which anymore.
natural
There were so many bags at the airport, it was impossible to know which is which without tags.
natural