大丈夫

1. Origins, structure, and basic meaning

• Structure: 大丈夫（だいじょうぶ） means that something is all right or there is no need to worry.
• Basic usage: Use it to reassure someone that being a little late is fine or to check on someone who has fallen.

2. Common pitfalls and similar expressions

• Checking on someone and responding to an offer
  • 大丈夫ですか asks whether the other person is all right.
  • In response to an offer of help, 大丈夫です can mean that the speaker is fine and does not need help.