Answer: dullest

AnswerCrossword Clue
DULLESTLeast interesting
DULLESTBluntest.
DULLESTMost boring
DULLESTLeast lustrous
dullest(of sound) Not clear; muffled
dullestDULL, mentally slow
dullest(of a person) Slow to understand; stupid
dullestLacking interest or excitement
dullest(of activity) Sluggish, slow-moving
dullest(of a person) Feeling bored and dispirited
dullest(of an edge or blade) Blunt
dullest(of a person's senses) Not perceiving things distinctly; insensitive
dullest(of the weather) Overcast; gloomy
dullest(of pain) Indistinctly felt; not acute
dullestLacking brightness, vividness, or sheen