vki érdekében

• to play sy's game

• to plead sy's cause with sy

• to fight sy's battle

• to act on sy's behalf, to act on sy's behoof, to take sy's interest

• to speak for sy, to speak up for sy

• to play sy's game

• to go to bat for sy

• to put in a word for sy

• to go to bat for sy

• to fight sy's battle

• to plead sy's cause with sy

• to give sy one's good word, to put in a word for sy