unfavorable
adjective
Definitions
Serving to hinder or oppose; adverse, disadvantageous, inconducive, unsuitable.
Antonyms:favourableNot auspicious; ill-boding.
Synonyms:inauspiciousunfortunateAntonyms:favourablefortunateOf a belief, state of mind, etc.: not favourable; disapproving.
Synonyms:favourableOf wind or weather: causing delay or obstacles; not conducive to travel or work; inclement.