Syllable division derived from spelling — this word is not in the pronouncing dictionary, so no phonetic transcription is shown rather than a guessed one.
unfavourable is an adjective meaning "not encouraging or approving or pleasing". It carries 3 recorded senses.
not encouraging or approving or pleasing
“unfavorable conditions”
“an unfavorable comparison”
“unfavorable comments”
“unfavorable impression”
(of winds or weather) tending to hinder or oppose
“unfavorable winds”
involving or creating circumstances detrimental to success or effectiveness
“a disadvantageous outcome”
“a well-known study from the 1970's showed that gender stereotyping placed women in a disadvantageous position”
“made an unfavorable impression”
Definitions, synonyms and semantic relations for unfavourable come from Princeton University’s WordNet. Commonness is measured against a corpus of everyday English. Full sources and licences.