ぼうぜん呆然bouzenぼうぜん茫然bouzenぼうbouぜんzenボーゼンboozen
1.

A state of being in total disbelief and unable to react after encountering an unexpected situation, characterized by a sense of shock and confusion.

2.

An expressionless condition where one feels mentally lost or vague, as if completely disoriented and lacking a clear response to what has just occurred.

3.

The experience of being overwhelmed by an unforeseen event, resulting in an inability to think clearly or articulate thoughts, leaving a person momentarily stunned or bewildered.

Example:

その恐ろしい光景に呆然としている。