as·sib·i·late 
(ə-sĭbə-lāt′)
(ə-sĭbə-lāt′)tr.v. as·sib·i·lat·ed, as·sib·i·lat·ing, as·sib·i·lates
To pronounce with a hissing sound; make sibilant.
[AD- + SIBILATE.]
as·sib′i·lation n.
- retroflex
- retroflexion
- retrogradation
- retrograde
- retrograde ejaculation
- retrogradely
- retrogress
- retrogression
- retrogressive
- retrogressively
- retrolental
- retronym
- retroocular
- retroperitoneal
- retropharyngeal
- retrorocket
- retrorse
- retrorsely
- retrospect
- retrospection
- retrospective
- retrospectively
- retrotransposon
- retroussé
- retroversion