Syllable division derived from spelling — this word is not in the pronouncing dictionary, so no phonetic transcription is shown rather than a guessed one.
unsystematic is an adjective meaning "lacking systematic arrangement or method or organization". It carries one recorded sense.
lacking systematic arrangement or method or organization
“unsystematic and fragmentary records”
“he works in an unsystematic manner”
Definitions, synonyms and semantic relations for unsystematic come from Princeton University’s WordNet. Commonness is measured against a corpus of everyday English. .