Something that is cold and dark, tomb-like evoking dread or solemnity is...
alkaline
sepulchral
chrystalline
choral
Something (usually, face expression) that is dreary, mournful, bleak and gloomy is also called...
lugubrious
transfixing
anticlimactic
tremendous
This adjective is great to describe shadowy and obscure surroundings a moody scene.
oneiric
floaty
tenebrous
dazzling
An adjective that relates to light and dark contrast is...
stalwart
vigilant
vivid
chiaroscuro
A remark / comment / humour that is sharply sarcastic is...
vivacious
mordant
jubilant
cerebral
A brooding, dark expression is...
verdant
lush
saturnine
robust
Subtly charming in an innocent way.
winsome
elusive
seraphic
tenacious
Transparently clear, either literally or metaphorically
Effervescent
Oblique
Murmurous
Pellucid
Whispering or rustling softly (e.g. leaves, water, wind)
magnetic
misty
enigmatic
susurrant
Sticky or clingy - both physically and emotionally
stridulant
gleaming
guttural
viscid
Tall, slender and graceful in motion.
willowy
indomitable
assertive
lissom
Smoothly charming.
mercurial
suave
unflappable
amorphous
Detached, drifting, without anchor - physically or emotionally
liminal
clandestine
unmoored
diaphanous
Able to change form easily; adaptable and elusive.
Abysmal
Intricate
Convalescent
Protean
