e4c6b47f___Miscellaneous___Status_Guide__Effects_On_Character
[Status Effect] Silence [How To Cure Effect] Remedy item, Echo Screen item, Esuna spell [Effects On Character] 
Small white speech bubble with "..." inside appears over character's head. Cannot use magic, Enemy Skills or summon magic.
The RPG Place - Final Fantasy VII - Miscellaneous - Status Guide
Effects On Character