dully

adverb
1
in a way that shows no feeling, understanding or interest
به‌طور بی‌تفاوت, با بی‌علاقگی, به‌گونه‌ای بی‌روح
2
in a way that is slightly dark, and not at all bright
تیره‌وار, کم‌نورانه, کدرانه
The moonlight shone dully on the surface of the lake.
3
to cause you pain in a continuous but not very severe way
به طور کسل کننده, به‌طور ملال‌آور, به‌صورت خسته‌کننده, کسل‌کنانه
His leg ached dully.