Syllable division derived from spelling — this word is not in the pronouncing dictionary, so no phonetic transcription is shown rather than a guessed one.
unadvised is an adjective meaning "without careful prior deliberation or counsel". It carries 2 recorded senses.
without careful prior deliberation or counsel
“ill-advised efforts”
“it would be ill-advised to accept the offer”
“took the unadvised measure of going public with the accusations”
Definitions, synonyms and semantic relations for unadvised come from Princeton University’s WordNet. Commonness is measured against a corpus of everyday English. Full sources and licences.