Quick answer
事 points to an event, matter or task. In 没事, it helps form a reply that can mean 'I'm fine' or 'It's okay'. 有事 can mean someone has something to do or that something is wrong; context decides.
Pinyin and pronunciation
shì
What the character contributes
The character itself has no fixed social tone. A reply such as 没事 gets its nuance from the conversation and delivery.
Examples in context
你没事吧?— 没事。
Nǐ méi shì ba? — Méi shì.
Are you okay? — I'm fine.
我今天有事。
Wǒ jīntiān yǒu shì.
I have something to do today.
Common mistakes
- A single English word 'thing' will not explain every compound containing 事.
- 没事 does not always mean there is literally no matter to discuss.
Related expressions
Sources and editorial note
These learning notes and examples are original project content. Compare dictionary senses with CC-CEDICT (CC BY-SA 4.0).