Answer: dully

AnswerCrossword Clue
DULLYWithout much intelligence
dullynot lively
dullyboring; tedious
dullynot bright
dullynot sharp
dullyto make or become dull
dullysomewhat dull
dullystupid
DULLYSans sparkle
DULLYIn a listless way
DULLYSluggishly
DULLYWithout enthusiasm
DULLYIn a blah manner
DULLYIn a listless manner
DULLYWithout sparkle
DULLYSans spirit
DULLYObtusely.
DULLYIn a tedious manner.
DULLYSluggishly.
DULLYDispiritedly.
DULLYIn a boring manner
DULLYWithout verve