dormant
inactive
quiet
abeyant
abiding
at a standstill
at rest
calm
changeless
cloistered
constant
contemplative
continuing
cool
do-nothing
durable
dwindling
ebbing
echoless
enduring
even-tenored
firm
fixed
frozen
halcyon
hush as death
hushed
idle
immobile
immutable
impassive
inaudible
inert
intact
inviolate
isolated
laissez-aller
laissez-faire
lasting
lurking
meditative
moldering
motionless
mousy
neuter
neutral
noiseless
pacific
paralytic
deaf
emotionless
expressionless
extinct
innocuous
inoperative
lifeless
passive
powerless
receptive
speechless
stationary
torpid
unavailable
undecided
undeveloped
uneventful
unoccupied
unproductive
unresponsive
valueless
weightless
Crescent
adolescent
antidepressant
convalescent
crescent
depressant
effervescent
evanescent
fluorescent
incandescent
incessant
iridescent
luminescent
obsolescent
suppressant