duller

adjective

1
Lacking the ability to cut easily; not sharp.
“All these knives are dull.”
2
Boring; not exciting or interesting.
“He sat through the dull lecture and barely stayed awake.”
3
Not shiny; having a matte finish or no particular luster or brightness.
“Choose a dull finish to hide fingerprints.”
4
Not bright or intelligent; stupid; having slow understanding.
5
Sluggish, listless.
6
Cloudy, overcast.
“It's a dull day.”
7
Insensible; unfeeling.
8
Heavy; lifeless; inert.
9
(of pain etc) Not intense; felt indistinctly or only slightly.
“Pressing on the bruise produces a dull pain.”
10
(of a noise or sound) Not clear, muffled.

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