What does dullen mean?
Dullen means (transitive, nonstandard) To make dull or duller; to dull..
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/ˈdʌlən/ · verb
(transitive, nonstandard) To make dull or duller; to dull..
Use dullen when its meaning, tone and grammar fit the full sentence. A synonym is not always a direct replacement.
Dullen means (transitive, nonstandard) To make dull or duller; to dull..
Common synonyms include dull.
The opposite depends on the specific sense.
Use dullen where its definition matches the intended context.
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