hushing

Từ điển WordNet v3.1 - WordNet Dictionary

noun

a fricative sound (especially as an expression of disapproval)
- the performers could not be heard over the hissing of the audience
• Syn:
hiss, hissing, fizzle, sibilation
• Derivationally related forms:
sibilate (for: sibilation), hiss (for: hissing), hiss (for: hiss)
• Hypernyms:
noise