Room
On the dirt you've made a roof over the ground where you can be in private. This is your room! That's really all a room is, you know? A covered, private place where you can have some time to yourself.
しつ
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The only problem with your room is that you can't always be alone. Because of your dad's shih tzu (しつ). The shih tzu likes to come into your room and pee everywhere. Ruining your privacy completely.