没事 (Méi shì) – “No Problem” or “It’s Okay”
“没事” is a versatile phrase that can mean “it’s okay,” “no problem,” or “don’t worry.” It’s commonly used in response to apologies or when reassuring someone that everything is fine.
Example:
A:Duìbuqǐ, wǒ lái wǎn le.
对不起,我来晚了。
Sorry, I’m late.B:
Méi shì.
没事。
No problem.
Source:eChineseLearning