Syllable division derived from spelling — this word is not in the pronouncing dictionary, so no phonetic transcription is shown rather than a guessed one.
muddiness is a noun meaning "the wetness of ground that is covered or soaked with water". It carries 3 recorded senses.
the wetness of ground that is covered or soaked with water
“the baseball game was canceled because of the wateriness of the outfield”
“the water's muddiness made it undrinkable”
“the sloppiness of a rainy November day”
a mental state characterized by a lack of clear and orderly thought and behavior
“a confusion of impressions”
the quality of being cloudy
Forms marked · are formed by the regular rule rather than recorded in the source data. English keeps a few hundred irregulars and the rest follow the pattern, so the rule is right far more often than not — but it is a rule, and the mark says so.
Definitions, synonyms and semantic relations for muddiness come from Princeton University’s WordNet. Commonness is measured against a corpus of everyday English. Full sources and licences.