showing or having no interest, energy etc

uncaring, disinterested

gloomy, miserable

depressing, unhappy

sleepy; stupid

tired, dull

not active

not engaged in action; inert, lazy

dull; not shiny or glossy

dull, lifeless

needing, ready for, sleep; (of places etc) quiet

tired, dull

not very active; slow-moving

dull, slow-moving

dark; gloomy

dull, lifeless

not having or showing spirit

depressed

long, tiring and not interesting

dull, monotonous