unfavourable

/ (ʌnˈfeɪvərəbəl, -ˈfeɪvrə-) /

not favourable; adverse or inauspicious

Derived forms of unfavourable

unfavourableness or US unfavorableness, noun unfavourably or US unfavorably, adverb

As Detroit learned the hard way, casinos can lead to unfavourable outcomes.

Two Huge Choices for Toronto's Future |David Frum |April 20, 2013 |DAILY BEAST
Perhaps the noise and bright lights of a dance-house are unfavourable to sentiment.

Gold, Gold, in Cariboo! |Clive Phillipps-Wolley
Taboo animals are thought to give favourable and unfavourable omens.

Human Animals |Frank Hamel
Most of these variations have no decisive tendency, favourable or unfavourable.

Parallel Paths |Thomas William Rolleston

The epidemic phase is reached when the environment is unfavourable to the host but not so or even favourable to the parasite.

Makers of British Botany; a collection of biographies by living botanists |Various
The wind was, however, unfavourable, and the enterprise was ultimately abandoned.

Ronald Morton, or the Fire Ships |W.H.G. Kingston