Definition of assibilate in English:

assibilate

verb

[WITH OBJECT]Phonetics
  • Pronounce (a sound) as a sibilant or affricate ending in a sibilant (e.g., sound t as ts)

    • ‘This would return forms of the verb annuntiare whether assimilated or not (ann - vs. adn-), assibilated or not (nunci - vs. nuncti-).’
    • ‘Moreover, gay men who speak with what a North American newsreader would consider an ‘accent’ - such as British, Australian, or even Texan gays - rarely assibilate at all.’
    • ‘In medieval manuscripts ti or di with a following vowel or diphthong are frequently replaced by z.’
    • ‘As such, increasing the periodicity in an assibilated rhotic may lead to the perception of the trill, even if it is not present.’

Origin

Mid 19th century: from Latin assibilat- hissed at from the verb assibilare, from ad- to + sibilare to hiss.

Pronunciation:

assibilate

/əˈsibəˌlāt/