At dawn the militia vowed to make head against the tyrant's forces.

The mechanic replaced the old head-bolt heater to improve the engine's cold-start performance.

Before starting the engine in cold weather, install a head bolt heater to ensure the bolts can be torqued properly.

Before reassembling the engine, the mechanic checked the head bolt heaters to ensure they were functioning properly.

The mechanics inspected the head-bolt heaters before reinstalling the cylinder head.

After years of battling myasthenia gravis, she developed dropped head syndrome that made it difficult for her to keep her chin raised.

Surprisingly, she makes head or tail of the scattered research notes, giving the team a clear outline to follow.

To take it into one's head to quit one's job on a whim can cause serious problems.

During the chaotic retreat, several drum-head courts were convened to try suspected deserters on the spot.

For a silly way to relieve stress, standing on one's head for a few minutes can unexpectedly boost your mood.