One sided nutrition isn’t good for you.
This word consists of kanji with hiragana attached. Because the hiragana ends with an う sound, you know this word is a verb. The kanji itself means biased, so the verb version is to be biased or to be prejudiced.
Since this word consists of a kanji with hiragana attached, you can bet that it will use the kun'yomi reading. You didn't learn that reading with this kanji, so here's a mnemonic to help you:
You meet someone who claims to be biased about everything. You ask them why and they say, "I'm a cutter, yo (かたよ)! I cut everything in half and only like one of 'em. But I guess if you wanna call that biased go ahead, man." Huh okay.