let

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

After he knocked for hours, I decided to let him come in.

Pharaoh said, I will let you go.

To allow to be or do without interference; to not disturb or meddle with; to leave alone.

Let me be!

Yet neither spinnes nor cardes, ne cares nor frets, / But to her mother Nature all her care she lets.

To allow the release of (a fluid).

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

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

I decided to let the farmhouse to a couple while I was working abroad.

“My dear Mr. Bennet,” said his lady to him one day, “have you heard that Netherfield Park is let at last?” Mr. Bennet replied that he had not. “But it is,” returned she; “for Mrs. Long has just been here, and she told me all about it.”

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

to let the building of a bridge;  to let out the lathing and the plastering

The allowing of possession of a property etc. in exchange for rent.

Then he says “You would call it a Good Let, Madam?” “O certainly a Good Let sir.”

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

He who now letteth will let, until he be taken out of the way.

Sir King, mine ancient wound is hardly whole, / And lets me from the saddle; […]

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

& there was syr Mordred redy awaytynge vpon his londage to lette his owne fader to lāde vp the lande that he was kyng ouer. "And there was Sir Mordred ready awaiting upon his landing, to let his own father to land upon the land that he was king over."

And as they went on their waye, they cam unto a certayne water, and the gelded man sayde: Se here is water, what shall lett me to be baptised?

To tarry or delay.

And for that strake I would not let, / Another upon him soon I set, […]