Grunt (grŭnt), v. t. [imp. & p. p. Grunted; p. pr. & vb. n. Grunting.] [OE. grunten; akin to As. grunian, G. grunzen, Dan. grynte, Sw. grymta; all prob. of imitative; or perh. akin to E. groan.] To make a deep, short noise, as a hog; to utter a short groan or a deep guttural sound.

Who would fardels bear,
To grunt and sweat under a weary life.

Grunt (grŭnt), n. 1. A deep, guttural sound, as of a hog.

2. (Zoöl.) Any one of several species of American food fishes, of the genus Hæmulon, allied to the snappers, as, the black grunt (A. Plumieri), and the redmouth grunt (H. aurolineatus), of the Southern United States; -- also applied to allied species of the genera Pomadasys, Orthopristis, and Pristopoma. Called also pigfish, squirrel fish, and grunter; -- so called from the noise it makes when taken.

• A short, snorting sound, often to show disapproval, or used as a reply when one is reluctant to speak.
  
• Of a pig: To make its snorting cry.
  
• (intransitive) Of a person: To make a grunt or grunts.
  
• (intransitive) Of a pig: To make a grunt or grunts.
  
  Swedish
• See grund
  
• Regular adverb construction of grund