Word: duller
Part of speech: Adjective
Syllables: dull
er
Definition: Alternative form of dull; become dull or lusterless in appearance; lose shine or brightness
Morphemes:
Affix: dull
Language: en
PoS: Adjective
Meaning: Not shiny; having a matte finish or no particular luster or brightness.
Affix: -er
Language: en
PoS: Suffix
Meaning: Used to form nouns shorter than more formal synonyms.