WordNet sense 1 (containing or implying a slight or showing prejudice):

invidious

WordNet sense 2 (not encouraging or approving or pleasing):

unfavorable, unfavourable

WordNet sense 3 (capable of making fine distinctions):

discriminative

WordNet sense 4 (showing or indicating careful judgment and discernment especially in matters of taste):

discriminating

WordNet sense 5 (being biased or having a belief or attitude formed beforehand):

prejudiced

WordNet sense 6 (manifesting partiality):

preferential

WordNet sense 7 (giving an advantage):

advantageous