narrows

To reduce in width or extent; to contract.

“We need to narrow the search.”

To get narrower.

“The road narrows.”

(of a person or eyes) To partially lower one's eyelids in a way usually taken to suggest a defensive, aggressive or penetrating look.

“He stepped in front of me, narrowing his eyes to slits.”

To contract the size of, as a stocking, by taking two stitches into one.

To convert to a data type that cannot hold as many distinct values.

“to narrow an int variable to a short variable”

A narrow part of a navigable waterway.