This is the 14120th most frequent Russian word.
опасные
Dangerous.
Here, 'опасные' is an adjective describing animals, showing their trait or characteristic of being dangerous.
Опасные животные можно встретить в джунглях.
Dangerous animals can be found in the jungle.
In this sentence, 'опасные' describes the roads, indicating a state or condition of being dangerous during winter.
Эти дороги зимой становятся особенно опасными.
These roads become especially dangerous in the winter.
Here, 'опасных' is used to describe 'ситуаций' (situations), showing their potentiality to involve danger or harm.