Because the hiragana ends with an う sound, you know this word is a verb. The kanji itself means distract and the verb vocab version of this word is to distract or to divert.

紛らす generally refers to trying to take your mind off negative things like boredom, pain, sadness, or stress, as in 気を紛らす (to distract yourself) or 痛みを紛らす (to take your mind off the pain). You're not removing the problem itself, just giving your brain something else to focus on so you can forget about it for a little while.

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:

When you want to distract yourself from all your troubles, you hang out with your pal Maggie (まぎ). Maggie's the most awesome person you know, and being around her always helps you to divert yourself from life's problems. Thanks for being such a great shoulder to lean on, Maggie!