同一

同一	tóng yī	identical; the same
同	tóng	like / same / similar / together / alike / with
同	tòng	see 胡同
一	yī	one / single / a (article) / as soon as / entire; whole; all; throughout / "one" radical in Chinese characters (Kangxi radical 1) / also pr. [yao1] for greater clarity when spelling out numbers digit by digit