noun
a sound like a prolonged 's' as of a snake
verb
making a sound like a prolonged 's' as of a snake
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The sound of hissing could be heard coming from the broken pipe.
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I could hear the hissing sound of the deflating balloon.
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The snake started hissing at me when I got too close.
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The tension in the room was so thick you could almost hear the hissing of anger between them.