Good At
Skillful
い adjective
Remember how 上手 means that you're good at something? Well, this word uses the exact same kanji, and means the exact same thing!
That い on the end is your clue that the reading is different, and you can forget about the readings you learned for each kanji. This is a native Japanese word, and the kanji were assigned to it based on the meaning alone. That means you just have to memorize the reading, so here's a mnemonic to help you:
When you see that someone's good at something, you say, "Ooh, my (うまい)!" at the top of your lungs. Try it! Think of something that impresses you and say "ooh my!" out loud.
パパはテニスが上手い。
Dad is good at tennis.
上手い人がチームに入った。
A skillful person joined the team.
この作文、なかなか上手いですね。
This composition is pretty well-written.