同窗

同窗	tóng chuāng	schoolmate / fellow student
同	tóng	like / same / similar / together / alike / with
同	tòng	see 胡同
窗	chuāng	old variant of 窗
窗	chuāng	variant of 窗
窗	chuāng	variant of 窗
窗	chuāng	window / CL:扇
窗	chuāng	variant of 窗