Definition of sibilate in English:

sibilate

verb

[WITH OBJECT]literary
  • Utter with a hissing sound:

    ‘two gentlemen turned round to me and sibilated the word ‘Poet’’
    [with direct speech] ‘‘Do you think it's worthwhile,’ sibilated Miss Miranda’
    • ‘Vishal loved the way they sibilated the word.’
    • ‘‘Come here,’ the young man sibilates, but then he sits down next to her.’
    • ‘He sibilated sharply and slammed Trey's iced coffee on the counter, stumbling back frantically.’
    • ‘Imagine a subtle chorus of voices, the ever present sibilating that accompanies any large crowd.’
    • ‘The needle, as it glides across the grooves, sibilates softly and crackles once or twice.’

Origin

Mid 17th century: from Latin sibilat- hissed, whistled, from the verb sibilare.

Pronunciation:

sibilate

/ˈsɪbɪleɪt/