Young Person
noun, の adjective
A young someone is a young person.
The reading for this one is a pain. 若 is the same as what you learned with the kanji (わか), but 者 is もの, which isn't what you learned. Think of this: A young person does what they want. They don't follow tradition or do anything the way you'd want them to, just like the reading of this word. Also, their actions make you really want to moan (もの) because ugh, young people. Get off my lawn.
この若者はすごいよ。大物になる前にサインをもらっておいた方がいいよ。
This young man is terrific. You should get his autograph before he becomes a big-shot.
若者たちは日本の未来なんですよ。もっと若者の声をしっかり聞きましょうよ！
The youth are the future of Japan. Let's listen more carefully to the voices of the young people!
その若者は薬の中で座薬が一番好きだそうです。
Apparently, the young man likes suppositories the best out of of all medications.