transferred. To make a deep harsh sound resembling a groan.

transferred. Of things, esp. in later use of a railway engine: To make or emit a sound resembling or suggestive of a snort.

To give out a snarling noise.

Scottish, northern dialect and U.S. Of things, wind, etc.: To make or give out a roaring or droning noise.

intransitive. To grunt, snore. dialect.