unfavorable

English

un- +‎ favorable

unfavorable (comparative more unfavorable, superlative most unfavorable)

Disadvantageous, adverse, unsuitable, inconducive; serving to hinder or oppose.
- 1863, Henry David Thoreau, Excursions, ch. 6:
  The shade of a dense pine wood, is more unfavorable to the springing up of pines of the same species than of oaks within it.
(of a belief, state of mind, etc) Not favorable, disapproving.
- 1860, George Eliot, The Mill on the Floss, ch. 11:
  [Y]et the thing she most dreaded was to offend the gypsies, by betraying her extremely unfavorable opinion of them.
(of wind or weather) Causing obstacles or delay; not conducive to travel or work; inclement.
- 1855, Herman Melville, Israel Potter, ch. 17:
  The wind was right under the land, the tide unfavorable.
Not auspicious; ill-boding.
- 1903, Anna Katharine Green, The Filigree Ball, ch. 6:
  The fact that the bride went through the ceremony without her bridal bouquet is looked upon by many as an unfavorable omen.

Nouns to which "unfavorable" is often applied: condition, circumstance, weather, climate, outcome, result, opinion, view, impression, effect, consequence, impact, influence, environment, balance, information, report, prognosis, rating, evaluation, review, position, factor, feature, aspect, reaction, response, attitude, season, development, treatment, ruling, case, state, experience, inference.

disadvantageous, serving to hinder or oppose

of a belief, state of mind: not favorable, disapproving

causing obstacles or delay (of wind or weather)

not auspicious; ill-boding