1. A circumstance or set of circumstances that are not advantageous or favorable; circumstances that make something difficult or unlikely to succeed
The project was completed despite unfavorable conditions.
O projeto foi concluído apesar das condições desfavoráveis.
2. Environmental, economic, or social circumstances that are not ideal for a particular activity or outcome
Unfavorable conditions in the market led to lower sales.
As condições desfavoráveis no mercado levaram a vendas menores.