Thesaurus

Synonyms for Unfavourable include:

abominable, admonishing, admonitory, adverse, atrocious, awful, bad, belittling, blistering, captious, carping, caviling, censorious, contrary, corked, corky, crappy, critical, deplorable, deprecating, deprecative, deprecatory, depreciative, depreciatory, derogative, derogatory, disapproving, discriminatory, disinclined, dislogistic, dismissive, disobedient, disparaging, dissentient, dissenting, dissident, distressing, dreadful, dyslogistic, evil, faultfinding, fearful, frightful, hard, harmful, hopeless, horrid, hostile, hypercritical, icky, ill, inauspicious, incompetent, invidious, lamentable, lousy, mediocre, mischievous, naughty, negative, nitpicking, no-good, ominous, overcritical, painful, pejorative, pettifogging, pitiful, poor, pretty, quibbling, reproachful, reproving, rotten, rubber, sad, sarcastic, scalding, scathing, severe, slighting, sneering, snide, sorry, stinking, stinky, supercilious, swingeing, terrible, thunderous, tough, uncomplimentary, uncool, unfavorable, unfavourable, unpropitious, unskilled, unspeakable, unsuitable, untoward, vituperative, worse, worst

unfavourable is a ADJ.