muffled (adj.)
- armored
 - bated
 - cased
 - cloaked
 - clouded
 - coated
 - coped
 - covered
 - covert
 - cowled
 - cryptic
 - curtained
 - dead
 - deadened
 - dormant
 - dull
 - dulled
 - encased
 - enwrapped
 - esoteric
 - filmed
 - flat
 - floored
 - hibernating
 - hidden
 - latent
 - mantled
 - masked
 - muted
 - mystic
 - occult
 - packaged
 - paved
 - possible
 - potential
 - sheathed
 - shelled
 - shielded
 - sleeping
 - smothered
 - softened
 - stifled
 - subdued
 - submerged
 - tented
 - underlying
 - veiled
 - virtual
 - wrapped
 
Art is long, and time is fleeting,
And our hearts, though stout and brave,
Still like muffled drums are beating
Funeral marches to the grave.