When talking to her, she said nothing but bowed her head and smiled. What do you mean?

She doesn't talk and smiles with her head down, which may have many meanings, depending on the situation and environment. Here are some possible explanations:

1. Embarrassed or not knowing what to say: She may feel a little embarrassed or not knowing what to say, so she chooses not to talk and smiles to avoid embarrassment.

2. Shyness: She may feel shy and unwilling to talk.

3. Agree or agree: She may think what you said is right, so she chooses not to refute or comment.

4. Don't want to talk to you: She may not be interested in you or what you say, so she chooses not to respond.

The most accurate explanation needs more contextual information.