LETTING

To allow to, not to prevent (+ infinitive, but usually without to).

Example: "After he knocked for hours, i decided to let him come in."

To leave.

Example: "Let me alone!"

To allow the release of (a fluid).

Example: "The physicians let about a pint of his blood, but to no avail."

To allow possession of (a property etc.) in exchange for rent.

Example: "I decided to let the farmhouse to a couple while i was working abroad."

To give, grant, or assign, as a work, privilege, or contract; often with out.

Example: "To let the building of a bridge;  to let out the lathing and the plastering"

Used to introduce an imperative in the first or third person.

Example: "Let p be the point where ab and ox intersect."

To cause (+ bare infinitive).

Example: "Can you let me know what time you'll be arriving?"

To hinder, prevent, impede, hamper, cumber; to obstruct (someone or something).

To prevent someone from doing something; also to prevent something from happening.

To tarry or delay.