gruntulous

adjective2

1. •
   Of a sound, resembling a grunt; gruntlike.

   • We crawled, as it seemed, a long time before we saw either Selenite or mooncalf, though we heard the bellowing and gruntulous noises of these latter continually drawing nearer to us. — 1900
2. •
   Full of grunts; expressed with grunts.

   • Back at the shanty, Bradly's compunction for bellowing at Podson was a good deal relieved by Podson's gruntulous annoyance at being bellowed at. — 1938