"unfavourable" in the adjective sense
1. unfavorable, unfavourable
not encouraging or approving or pleasing
"unfavorable conditions"
"an unfavorable comparison"
"unfavorable comments"
"unfavorable impression"
2. unfavorable, unfavourable
of winds or weather) tending to hinder or oppose
"unfavorable winds"
3. disadvantageous, unfavorable, unfavourable
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"
Source: WordNet® (An amazing lexical database of English)
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