Syllable division derived from spelling — this word is not in the pronouncing dictionary, so no phonetic transcription is shown rather than a guessed one.
undesirous is an adjective meaning "having or feeling no desire". It carries one recorded sense.
having or feeling no desire
“a very private man, totally undesirous of public office”
Definitions, synonyms and semantic relations for undesirous come from Princeton University’s WordNet. Commonness is measured against a corpus of everyday English. Full sources and licences.