Open English Wordnet
Adjectives
(a)unfavorable, unfavourablenot encouraging or approving or pleasing“unfavorable conditions”, “an unfavorable comparison”, “unfavorable comments”, “unfavorable impression”
(a)disadvantageous, unfavorable, unfavourableinvolving 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”