This is the 9722nd most frequent French word.
enneigées
Snow-covered.
The word 'enneigées' here is used as an adjective to describe the mountains as being covered in snow.
Les montagnes enneigées brillent sous le soleil hivernal.
The snowy mountains shine under the winter sun.
In this sentence, 'enneigées' describes the ski slopes as having a good amount of snow coverage, emphasizing suitability for skiing.
Nos vacances de ski ont été merveilleuses grâce aux pistes bien enneigées.
Our ski vacation was wonderful thanks to the well-snowed slopes.
Here, 'enneigés' modifies 'arbres' (trees) to convey that they are covered in snow, contributing to the enchanting quality of the scene.