1) Apathetically 2) Boringly 3) Deeply 4) Flatly 5) In a blah manner 6) In a boring manner 7) In a listless manner 8) In a listless way 9) Lifelessly 10) Monotonously 11) Routinely 12) Sans spirit 13) Sluggishly 14) Tediously 15) Uninterestingly 16) With no enthusiasm 17) Without enthusiasm 18) Without liveliness 1) Boringly 2) Dazedly 3) Emptily 4) Insipidly 5) Numbly 
• (adv.) In a dull manner; stupidly; slowly; sluggishly; without life or spirit.
Dul'ly adverb In a dull manner; stupidly; slowly; sluggishly; without life or spirit. « Supinely calm and dully innocent.» G. Lyttelton. 
[adv] - without luster or shine 2. [adv] - without liveliness
adverb without liveliness; `she nodded her head dully`