en_tn/pro/21/09.md

a corner of the roof

Houses in those days had flat roofs. Ancient Israelites spent much time on their roofs, where it was often cooler than inside the house, and sometimes people would build a shelter large enough for a person to sleep in on one corner of the roof. (See: rc://en/ta/man/translate/figs-explicit)

quarrelsome wife

"wife who often argues and complains"