Meaning

noun a female person who has the same parents as another person

verb express or utter with a hiss

verb make a sharp hissing sound, as if to show disapproval

originFrom Middle English sissen, perhaps from Middle Dutch sissen, cissen or Middle Low German sissen (“to hiss; buzz”), of imitative origin. Cognate with Dutch sissen, German Low German zissen, German zischen.

Etymology from Wiktionary, CC BY-SA 3.0