同一

tóngyī
identical; the same

CEDICT

Entry Composition

1 同 tóng
  1. like
  2. same
  3. similar
  4. together
  5. alike
  6. with
2 一 yī
  1. one
  2. single
  3. a (article)
  4. as soon as
  5. entire; whole; all; throughout
  6. "one" radical in Chinese characters (Kangxi radical 1)
  7. also pr. yāo for greater clarity when spelling out numbers digit by digit