Assibilate
Pronunciation : As*sib"i*late
Part of Speech : v. t.
Etymology : [L. assibilatus, p. p. of assibilare to hiss out; ad + sibilare to hiss.]
Definition : Defn: To make sibilant; to change to a sibilant. J. Peile.
Source : Webster's Unabridged Dictionary, 1913