Come learn 2000+ kanji and 6000+ vocabulary words with WaniKani.
To Be Troubled
Because the hiragana ends with an う sound, you know this word is a verb. The kanji itself means worry so the verb vocab version is to worry.
The reading is the same as what you learned with the kanji, so no need to worry about it.
"Hey! What’s troubling you?" "My girlfriend dumped me last night."