Morose
Depressed
Conundrum
Riddle or Mystery
Ominous
A sign something unpleasent that is about to happen.
Opaque
To dark or thick for light to pass through
Exuberant
Uncontrollably joyous
Altruistic
Unselfish; caring
Pompous
filled with self importance, arrogant, obnoxiously proud
Impede
get in the way, or hinder
Concur
Agree