きづ気付kizukukiづくzuku
1.

To suddenly become aware of something that was previously unnoticed or unrecognized, often triggered by a specific event or moment of reflection.

2.

To regain consciousness or awareness after a period of oblivion or distraction, signifying a return to a state of mental clarity.

3.

To acknowledge the existence of an item or the state of affairs that had not been considered before, usually leading to a realization or understanding of its significance.

Example:

彼は危険に気づいていなかった。