To tug means to pull something with a quick, strong effort. When you tug on a stuck drawer, you're yanking it firmly to get it open. When your dog tugs at its leash during a walk, it's pulling hard toward something interesting it spotted across the street.

A tug is also a short, powerful pull itself: you might give the rope a tug to test if it's secure, or feel a tug on your fishing line when something bites. Sometimes we feel an emotional tug, like when a sad story tugs at your heartstrings, meaning it pulls at your feelings.

The word also refers to tugboats, small but incredibly powerful boats that tug much larger ships into harbors and docks. Despite their size, tugboats can move massive cargo ships that weigh thousands of tons, which is why people use “tug” to describe determined, forceful pulling.

When two people or groups want opposite things, they might engage in a tug-of-war, either literally pulling opposite ends of a rope or figuratively competing for control of something. The word captures that sense of determined effort: tugging isn't gentle or casual. It's pulling with real force and intention.