This is the 14119th most frequent Russian word.
опасное
Dangerous.
Here, "опасная" (dangerous) is used as an adjective describing the road, metaphorically pointing out its hazardous conditions during the specified weather.
Эта дорога очень опасная в гололёд.
This road is very dangerous during ice.
Here, "опасное" describes the singular noun "животное" (animal) as an adjective in its nominative case, emphasizing the possible threat posed by the animal.
Опасное животное вышло из леса.
A dangerous animal came out of the forest.
In this sentence, "опасными" represents the plural form of the adjective "опасное" agreeing with the noun "виды спорта" (types of sports) in instrumental case.