1. [adj]  (of light) not bright or glaring; "a softer diffused radiance"
2. [adj]  being or made softer or less loud or clear; "the dull boom of distant breaking waves"; "muffled drums"; "the muffled noises of the street"; "muted trumpets"
3. [adj]  toned down

SOFTENED is a 8 letter word that starts with S.