さわsawaru
1.

To make contact with something using one's hands or body, often to verify its presence or to experience a particular sensation, typically involving intentional action.

2.

To restrictively engage or interfere with a situation or matter, often implying that involvement could lead to unintended consequences or complications.

3.

To have a physical or emotional impact on someone or something, which may result in discomfort or irritation, suggesting an overstepping of boundaries.

Example:

触らぬ神に祟りなし。