An Etymological Dictionary of Astronomy and Astrophysics

1. Making no sound; quiet; still.
   

2. Refraining from speech.

Etymology (EN): From L. silentem (nominative silens) “still, calm, quiet,” p.p. of silere “to be quiet or still,” of unknown origin.

Etymology (PE): Bideng, from Kurd. (Kurmanji) bêdeng, bêdêng, Kurd. (Sorani) bedang, from bi- “without,” → a-, + deng “sound, voice,” variants dong, dang, bâng,
→ Big Bang.