ケビンは幸雄宅にいそうろうしてるけど　What does ”Iso-Rou” mean?

Let’s Study Japanese with Kevin from a book, ”Kevin Goes to Japan”

Nov 12 2022 • 8 mins

Kevin lives in Yukio's house, but he doesn't pay anything. That is called, "Iso-rou" in Japanese, but what it is?

親友の幸雄宅に住んでるケビン。でも一銭も払っていません。それを「居候」と言いますが、どうして？