This is the 10126th most frequent French word.
hivernal
Relating to winter.
The word 'hivernale' here modifies 'season', specifying it as relating to winter.
Durant la saison hivernale, les températures peuvent descendre très bas.
During the winter season, temperatures can drop very low.
Here, 'hivernal' is an adjective describing 'landscape', indicating that the scenery pertains to winter.
Le paysage hivernal est magnifique.
The winter landscape is magnificent.
In this sentence, 'hivernaux' is the masculine plural form of 'hivernal', describing 'sports', referring to activities specifically associated with winter.