dangerous

mastery
UK /ˈdeɪn.ʒ(ə.)ɹəs/ US /ˈdeɪn.d͡ʒ(ə.)ɹəs/adj

card 1 of 10 · synonym

Which word is closest in meaning to 'dangerous' in this sentence?

Swimming in that river has always been notoriously dangerous because of the strong currents.