Siss v. i. To make a hissing sound; as, a flatiron hot enough to siss when touched with a wet finger. [Colloq. U. S.; Local, Eng.]
Siss, n. A hissing noise. [Colloq. U. S.]
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siss
v 1: express or utter with a hiss [syn: hiss, sizz, sibilate]
2: make a sharp hissing sound, as if to show disapproval [syn:
hiss, sizz, sibilate]