dull vs inactive

dull and inactive both are adjectives.

Word	Noun	Adjective	Verb	Adverb
dull	No	Yes	Yes	No
inactive	No	Yes	No	No

dull (adjective)	inactive (adjective)
not having a sharp edge or point	(military) not involved in military operations
emitting or reflecting very little light	not active physically or mentally
lacking in liveliness or animation	(pathology) not progressing or increasing; or progressing slowly
not keenly felt	lacking activity; lying idle or unused
darkened with overcast	lacking in energy or will
(of business) not active or brisk	(of e.g. volcanoes) not erupting and not extinct
blunted in responsiveness or sensibility	not exerting influence or change
being or made softer or less loud or clear	not engaged in full-time work
slow to learn or understand; lacking intellectual acuity	not in physical motion
not clear and resonant; sounding as if striking with or against something relatively soft	(chemistry) not participating in a chemical reaction; chemically inert
(of color) very low in saturation; highly diluted
so lacking in interest as to cause mental weariness

dull (verb)	inactive (verb)
become dull or lusterless in appearance; lose shine or brightness
make less lively or vigorous
become less interesting or attractive
make dull in appearance
make dull or blunt
deaden (a sound or noise), especially by wrapping
make numb or insensitive