Syllable division derived from spelling — this word is not in the pronouncing dictionary, so no phonetic transcription is shown rather than a guessed one.
unnoted is an adjective meaning "not taken into account". It carries one recorded sense.
not taken into account
“his retirement was not allowed to go unmarked”
Definitions, synonyms and semantic relations for unnoted come from Princeton University’s WordNet. Commonness is measured against a corpus of everyday English. Full sources and licences.