To Guess
To Hit, To Put
transitive verb, ichidan verb
You know that the kanji 当 means right or success. So since this is a verb, you're doing right and success (which doesn't make much sense). Instead, you're guessing something and getting it right. So, this word means to guess something. Hopefully you don't have to guess too hard when it comes to the meaning of this word as well.
The reading can be remembered via the word 当たる which you learned a few levels ago. Use that knowledge to remember that this word is read as あてる. The important part is the あ.
父は安いお茶と高いお茶を当てるのが上手です。
My father is good at guessing if tea is cheap or expensive.
大谷氏は、バットにボールを当てる天才です。
Mr. Ohtani is a genius at hitting the ball with the bat.
私には電話番号で、その人の未来のことを当てる力があります。
I have the power to guess a person's future by their phone number.