This is the 9536th most frequent French word.
défavorable
Unfavorable; adverse.
In this sentence, "défavorable" describes the weather conditions as not suitable or disadvantageous for the planned activity, a sea trip.
Les conditions météorologiques étaient défavorables pour une sortie en mer.
The weather conditions were unfavorable for a sea trip.
Here, "défavorable" is used to indicate that the report negatively affected someone's chances in applying for a position or opportunity.
Le rapport a été défavorable à sa candidature.
The report was unfavorable to her application.
In this example, "défavorable" conveys a person's negative stance or lack of support towards an ongoing project.