silencioso
/silenˈθjoso/ · B1 · adj
silent
🔇 silencio (silence) + -oso (full of) = full of silence
The Spanish suffix -oso works like English -ous: famoso = famous, nervioso = nervous. So silencioso is literally silence-ous. From Latin silentium. The c sounds like th in Spain and like s in Latin America.