Tighten (verb)

1. To make something tighter.
2. To become tighter.

Origin:

From the old english word "tīhtian" meaning to make tighter, it means to make something tighter or to become tighter.

Examples:

1. The mechanic tightened the bolts on the engine to ensure they were secure.
2. The athlete tightened her grip on the barbell as she lifted it.
3. The shoelace needed to be tightened to prevent it from coming undone.
4. The artist tightened the stretched canvas on the frame.
5. The manager tightened the rules for the employees in order to increase productivity.