In special relativity, the energy and momentum of a particle can be combined into a single four-vector.

The carpenter arranged the four by twos along the wall before cutting them to length.

She aimed for the four foot to score the extra point.

The railway historian explained that the term four-foot referred to the track gauge used by several early lines.

He grinned and pushed his cards forward, exposing four pips and winning the pot.

The poem spoke of four-and-twenty knights who guarded the ancient oak.

A stray log got stuck in the four foot, forcing the driver to signal for an emergency stop.

The four-master cut through the morning fog as fishermen prepared their nets.

The pitcher relied on his four-seamers to escape the jam in the ninth inning.

In the ninth, he blew a 98 mph four-seamer past the slugger for the final out.