WORD OF THE DAY-GRUNT

Grunt, as in "he grunts and moans", is an onomatopoeic word that imitates the sound of grunting. The use of grunt for an American infantryman, who does a lot of grunting and groaning, probably dates back no further than the late 1950's and did not become common for "dogfaces" until the Vietnam War. One story has Marine Corps pilots coining the term/