Definition of assibilate:
(v) :
change into a sibilant; insert a sibilant sound before or after (another sound)
"In the syllable /si/, the /s/ sibilates in Japanese"
Definition of assibilate:
(v) :
change into a sibilant; insert a sibilant sound before or after (another sound)
"In the syllable /si/, the /s/ sibilates in Japanese"