Chthonic

Dwelling in or under the earth; pertaining to the underworld.

Satan will not be allowed as an answer!! :D

TENACIOUS

not easily pulled apart : cohesive

persistent in maintaining, adhering to, or seeking something valued or desired

Zesty

piquant
energetic
having kick

QUIXOTIC

fanciful
fantastic
imaginary

This one should be fun

translucent

translucent:

clear
transparent
transmitting and diffusing light so that objects beyond cannot be seen clearly
free from disguise or falseness

triskaidekaphobia

fear of the number 13

lol

XENOPHOBIC

describes one with an unreasonable fear or hatred of foreigners or strangers or of that which is foreign or strange.

INCALCULABLE

1. very numerous or great.
2. unable to be calculated; beyond calculation.
3. incapable of being forecast or predicted; undeterminable.
4. uncertain; unsure.

I had to delete my first post...I realized it was a verb not an adj. lol

WHIMSICAL

Fanciful

Capricious

Playful

Nonchalant

casual
indifferent
unconcerned

PECKISH

Hungry

Empty

Hollow

INCONGRUOUS

mismatched
out of place
absurd
discordant
incompatible
unexpected

VALIANT

heroic
noble
brave

In memory of one of my personal heroes, Alexander Solzhenitsyn, who died today. No, you may not use him as your answer. That would be cheating ;-)