Since this word consists of a kanji with hiragana attached, you can bet that it will use the kun'yomi reading. You haven't learned this reading yet, so here's a mnemonic to help you:
You have to sew yourself some clothes because if you don't you'll be completely nude (ぬ). You don't want anyone to see your bits! Sew quickly!
We sewed dust cloths in home economics class.