諳事

谙事
ānshì
  1. (often used in the negative in describing a young person) to have an understanding of things
  2. to know how the world works

CEDICT

熟悉、明白事理。

重編國語辭典

Entry Composition

1 諳 ān
  1. to be versed in
  2. to know well
2 事 shì
  1. matter
  2. thing
  3. item
  4. work
  5. affair

classifiers: 件, 樁, 回