師出無名 shī chū wú míng

DEFINITIONS

  1. lit. to go to war without just cause (idiom)
  2. to act without justification

CHARACTERS

師 shī teacher, master, specialist; multitude, troops
出 chū
HSK 1
go out, send out; stand; produce
無 wú negative, no, not; lack, have no
名 míng
HSK 1
name, rank, title, position