Syllable division derived from spelling — this word is not in the pronouncing dictionary, so no phonetic transcription is shown rather than a guessed one.
mildness is a noun meaning "good weather with comfortable temperatures". It carries 3 recorded senses.
good weather with comfortable temperatures
acting in a manner that is gentle and mild and even-tempered
“his fingers have learned gentleness”
“suddenly her gigantic power melted into softness for the baby”
“even in the pulpit there are moments when mildness of manner is not enough”
mercifulness as a consequence of being lenient or tolerant
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 mildness come from Princeton University’s WordNet. Commonness is measured against a corpus of everyday English. Full sources and licences.