一回事兒
yī​huí​shì​r

one and the same thing

yī​huí​shì​r one and the same thing
  1. 一 yī numeral
    same
    same; identical; unified
  2. 回 huí nounverb
    [matters]
    (measure word) an item or matter, often in the phrase 一回事 yī​huí​shì
  3. 事 shì noun
    matter
    matter; affair; thing; event
  4. 儿 兒 r particleaffix
    [erhua suffix]
    A suffix attached to a word to form a retroflex ending, often indicating a small size, a sense of familiarity, or turning a word into a noun.

yī​huí​shì​r one thing
  1. 一 yī numeral
    one
    one; the number 1; single; alone
  2. 回 huí nounverb
    [matters]
    (measure word) an item or matter, often in the phrase 一回事 yī​huí​shì
  3. 事 shì noun
    matter
    matter; affair; thing; event
  4. 儿 兒 r particleaffix
    [erhua suffix]
    A suffix attached to a word to form a retroflex ending, often indicating a small size, a sense of familiarity, or turning a word into a noun.