unfavourable

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.

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 from all those who were not immediately on the spot.

[Y]et the thing she most dreaded was to offend the gypsies, by betraying her extremely unfavourable opinion of them, …

The wind was right under the land, the tide unfavorable.