tack

A small, sharp-pointed nail with a flat head, used for fastening.

"He used a tack to fix the poster."

Cheap, poor quality material or goods, often considered shoddy.

"Don't buy that cheap tack."

To fasten or attach something with a small nail or pin.

"She tacked the fabric to the board."

Equipment used for riding horses, such as saddles, bridles, and stirrups.

"The groom polished the horse's tack."

To change a boat's direction by turning its bow through the wind.

"The sailor tacked to catch the wind."