—n.
1 a low guttural sound made by a pig.
2 a sound resembling this.
3 any fish of the genus Haemulon that grunts when caught.
—v.
1 intr. (of a pig) make a grunt or grunts.
2 intr. (of a person) make a low inarticulate sound resembling this, esp. to express discontent, dissent, fatigue, etc.
3 tr. utter with a grunt.
Etymology: OE grunnettan, prob. orig. imit.
Useful english dictionary. 2012.