Syllable division derived from spelling — this word is not in the pronouncing dictionary, so no phonetic transcription is shown rather than a guessed one.
unconsidered is an adjective meaning "without proper consideration or reflection". It carries one recorded sense.
without proper consideration or reflection
“slovenly inconsiderate reasoning”
“unconsidered words”
“prejudice is the holding of unconsidered opinions”
Definitions, synonyms and semantic relations for unconsidered come from Princeton University’s WordNet. Commonness is measured against a corpus of everyday English. Full sources and licences.