Dangerous
Risky
い adjective
This is a single kanji with an い on the end, meaning you know it's probably an adjective. What's the adjective form of dangerous? It's dangerous.
あぶない
Since this word consists of a kanji with hiragana attached, you can bet that it will use the kun'yomi reading. You didn't learn that reading with this kanji, so here's a mnemonic to help you: Someone is in danger! It's poor old abe (あぶ) Lincoln. You try to save him, yelling out 危ないよ！！！！, but he gets shot in the back of the head anyways.
危ないから、車に荷物をつむのは力の強いビエトにやってもらおう。
It's dangerous, so just leave loading the baggage into the car to Viet, who's strong.
四つ葉のクローバーを見つけたら幸運がおとずれるって言うけど、ぎゃくに危ない目にあっちゃったよ。
They say if you find a four-leaf clover, you'll have good luck, but I got in a dangerous situation instead.
危ない会社のこんなに危ない計画に巻き込まれることに、誰も反対しなかったなんて信じられないよ！
I can’t believe no one opposed getting involved in the risky plan of such a risky company.