にぎ握nigiるru
1.
To use the five fingers of the hand to encircle or hold something tightly, preventing it from slipping away or being released easily.
2.
To consolidate or control power, influence, or information, ensuring that it remains securely in one's possession.
3.
To shape rice or other food by pressing it together with both hands to form a compact unit, such as sushi or rice balls.
4.
To physically grasp objects, such as handles or overhead straps, for support or maneuvering in various activities.
Example:
彼らが眠っている間私がハンドルを握った。