unfavorable

Adjective

unfavourable (comparative more unfavourable, superlative most unfavourable)

1. (UK) Serving to hinder or oppose; adverse, disadvantageous, inconducive, unsuitable.
   • 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.1863, Henry David Thoreau, chapter 6, in Excursions

   Antonyms:

   favourable

2. (UK) Not auspicious; ill-boding.
   • Elizabeth was now most heartily sorry that she had, from the distress of the moment, been led to make Mr. Darcy acquainted with their fears for her sister; for since her marriage would so shortly give the proper termination to the elopement, they might hope to conceal its unfavourable beginning...1813 January 27, [Jane Austen], chapter VIII, in Pride and Prejudice: […], volume III, London: […] [George Sidney] for T[homas] Egerton, […], →OCLC, page 148

   Synonyms:

   inauspicious, unfortunate, down on one's luck, fortuneless, ill-boding, ill-fated, ill-starred, infelicitous, infortunate, hapless

   Antonyms:

   favourable, fortunate, charmed, fortuitous, freak, happy, lucky, providential, serendipitous, sonsy

3. (UK) Of a belief, state of mind, etc.: not favourable; disapproving.
   • [Y]et the thing she most dreaded was to offend the gypsies, by betraying her extremely unfavourable opinion of them, [...]1860, George Eliot [pseudonym; Mary Ann Evans], “Maggie Tries to Run Away from Her Shadow”, in The Mill on the Floss […], volume I, Edinburgh; London: William Blackwood and Sons, →OCLC, book I (Boy...

   Synonyms:

   favourable

4. (UK) Of wind or weather: causing delay or obstacles; not conducive to travel or work; inclement.
   • The wind was right under the land, the tide unfavorable.1855, Herman Melville, chapter 17, in Israel Potter