Shallow
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 shallow? It's shallow.
あさい
The reading is the one you learned with the kanji, making this あさい
この海は浅いから子どもも安心して泳げます。
This beach is shallow, so even kids can swim safely here.
考えの浅い人間にはなりたくありません。
I don't want to become a person with shallow thoughts.
酔っ払うと、眠りが浅くなっちゃって、早朝覚醒しちゃうんだよね。
Whenever I get drunk, I only get light sleep and wake up early in the morning.