充作

chōngzuò
  1. to serve as
  2. to be a substitute for

CEDICT

  1. (of an unqualified person or thing) to serve as; to act as; to play the role of
  2. to serve as; to act as; to play the role of

Wiktionary

当做、假冒。如：「他拿伪钞充作真钞使用，当场遭人识破。」也作「充为」。

重編國語辭典

Entry Composition

1 充 chōng
  1. sufficient; full
  2. to fill
  3. to serve as; to act as
  4. to act falsely as; to pose as
2 作 zuò
  1. to do; to engage in
  2. to write; to compose
  3. to pretend; to feign
  4. to regard as; to consider to be
  5. to be; to act the part of
  6. to feel (itchy, nauseous etc)
  7. writings; works

Related entries

充当 chōngdāng
  1. to serve as
  2. to act as
  3. to play the role of
我为你充当导游。

I'll act as a guide for you.

Source: Tatoeba

以资 yǐzī
  1. by way of
  2. to serve as
用作 yòngzuò
  1. to use for the purpose of
  2. to serve as
墨汁用作染料时会产生有趣的图案。

India ink produces an interesting pattern when used as a dye.

Source: Tatoeba

担任 dānrèn
  1. to hold a governmental office or post
  2. to assume office of
  3. to take charge of
  4. to serve as
他擔任我的嚮導。

He acted as my guide.

Source: Tatoeba

为 wéi
  1. as (in the capacity of)
  2. to take sth as
  3. to act as
  4. to serve as
  5. to behave as
  6. to become
  7. to be
  8. to do
  9. by (in the passive voice)
眼見為憑。

To see is to believe.

Source: Tatoeba