unfavourable
adjective
UK ( US unfavorable) uk/ʌnˈfeɪvərəbl/ usnot good, and likely to cause problems or prevent success:
Other countries may lure private equity executives offshore if the tax regime in Britain became unfavourable.
unfavourable conditions/terms
unfavourable prices/exchange rates
unfavourable to sb/sth Market conditions have been unfavorable to fund managers in recent times.
showing that someone does not like something or disapproves of it:
The company has attracted unfavourable comparisons with its rivals.
Organic food retailers are benefiting from an increase in the amount of unfavourable publicity surrounding fast food.
an unfavourable report/review
unfavourably
adverb UK ( US unfavorably)
Customer satisfaction with their products compared unfavourably with that achieved by their competitors.