to be concerned about something.

चिंता करना

English Usage: Do you mind if I open the window?

Hindi Usage: क्या आपको चिंता है अगर मैं खिड़की खोल दूं?

to watch out or be careful.

सावधान रहना

English Usage: Mind out for that step; it's slippery!

Hindi Usage: उस कदम के लिए सावधान रहो; यह फिसलन भरा है!

the part of a person that enables them to be aware of the world and their experiences, to think, and to feel.

मन

English Usage: She has a curious mind that loves to explore new ideas.

Hindi Usage: उसका एक जिज्ञासु मन है जो नए विचारों की खोज करना पसंद करता है.