自作主张 zì zuò zhǔ zhāng

DEFINITIONS

  1. to think for oneself and act accordingly (idiom); to act on one's own initiative

CHARACTERS

自 zì self, private, personal; from
作 zuò make; work; compose, write; act, perform
主 zhǔ master, chief owner; host; lord
张 zhāng stretch, extend, expand; sheet