EnglishEdit

EtymologyEdit

dull +‎ -en

PronunciationEdit

VerbEdit

dullen (third-person singular simple present dullens, present participle dullening, simple past and past participle dullened)

  1. (transitive, nonstandard) To make dull or duller; to dull.
  2. (intransitive, nonstandard) To become dull or duller; to dull.

SynonymsEdit

AnagramsEdit