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sibilate

[sib-uh-leyt] /ˈsɪb əˌleɪt/
verb (used without object), sibilated, sibilating.
1.
to hiss.
verb (used with object), sibilated, sibilating.
2.
to utter or pronounce with a hissing sound.
Origin
1650-1660
1650-60; < Latin sībilātus (past participle of sībilāre to hiss); see sibilant, -ate1
Related forms
sibilation, noun
sibilator, noun
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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British Dictionary definitions for sibilation

sibilate

/ˈsɪbɪˌleɪt/
verb
1.
to pronounce or utter (words or speech) with a hissing sound
Derived Forms
sibilation, noun
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
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Word Origin and History for sibilation

sibilate

v.

1650s, from Latin sibilatus, past participle of sibilare "to hiss, whistle" (see sibilant (adj.)). Related: Sibilated; sibilating.

Online Etymology Dictionary, © 2010 Douglas Harper
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