That which stanches or checks a flow.

A floodgate by which water is accumulated, for floating a boat over a shallow part of a stream by its release.

To stop the flow of.

“A small amount of cotton can be stuffed into the nose to stanch the flow of blood if necessary.”

To cease, as the flowing of blood.

To prop; to make stanch, or strong.

Strong and tight; sound; firm.

“a stanch ship”

Firm in principle; constant and zealous; loyal; hearty; steadfast.

“a stanch churchman; a stanch friend or adherent”

Close; secret; private.