Groove fricatives all have more or less of an -like quality, and are for this reason sometimes called sibilants.
She had a curious habit of prefacing everything she said with a soft sibilant sound.S-s-s Grace, she said, it's just like I was telling Brother Hutson the other day. 'S-s-s Brother Hutson,' I said, 'looks like we're fighting a losing battle, a losing battle.' I said..