假充

jiǎchōng
  1. to pose as sb
  2. to act a part
  3. imposture

CEDICT

冒充。《醒世恆言．卷三六．蔡瑞虹忍辱报仇》：「每常有下路粮船，运粮到京，交纳过后，那空船回去，就揽这行生意，假充座船，请得个官员坐舱，那船头便去包揽他人货物，图个免税之利。」《红楼梦．第二回》：「夫妻无子，故爱女如珍；且又见他聪明清秀，便也欲使他读书识几个字，不过假充养子之意，聊解膝下荒凉之歎。」也作「假冒」。

重編國語辭典

Entry Composition

=1 假 jiǎ
  1. fake
  2. false
  3. artificial
  4. to borrow
  5. if
  6. suppose
=1 假 jiǎ
  1. variant of 假 jiǎ
  2. to borrow
2 充 chōng
  1. sufficient; full
  2. to fill
  3. to serve as; to act as
  4. to act falsely as; to pose as

Related entries

装作 zhuāngzuò
  1. to pretend
  2. to feign
  3. to act a part
他裝作沒在聽。

He pretended not to be listening.

Source: Tatoeba