Gruntulous

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.

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.

[…] he walked about the garden or stood in gruntulous meditation before the fire, none daring to interrupt his cogitations by a whisper.