hiss

/hɪs/
verb
  1. To make a long, soft sound like the letter 's', often as a sign of disapproval or anger.
    • The audience began to hiss when the actor forgot his lines.
    • The cat hissed at the dog that came too close.
    • Steam hissed from the kettle as the water boiled.
  2. To say something in a sharp, angry whisper.
    • 'Get out of my way,' she hissed through clenched teeth.
    • The guard hissed at the prisoners to be quiet.
    • He hissed a warning to his friend as the teacher walked by.
Antonyms
noun
  1. A long, soft sound like the letter 's', often made by animals, steam, or people showing disapproval.
    • The snake gave a loud hiss to scare away the predator.
    • The actor was greeted by a hiss from the unhappy crowd.
    • A hiss of steam escaped from the radiator.