Syllable division derived from spelling — this word is not in the pronouncing dictionary, so no phonetic transcription is shown rather than a guessed one.
reddened is an adjective meaning "(especially of the face) reddened or suffused with or as if with blood from emotion or exertion". It carries 2 recorded senses.
lighted with red light as if with flames
“streets ablaze with lighted Christmas trees”
“the inflamed clouds at sunset”
“reddened faces around the campfire”
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 reddened come from Princeton University’s WordNet. Commonness is measured against a corpus of everyday English. Full sources and licences.