The new employee tried to challenge the boss, but was quickly put in his place during the meeting.

put 在这里是动词，意思是"放置"或"使处于某种状态"。 in 是介词，表示"在...里面"或"处于某种状态"。 his 是形容词性物主代词，指代"他的"。 place 在这里指"位置"或"应有的地位"。 put in his place 是一个固定短语，意思是"使某人认清自己的位置"或"压制某人的气焰"，通常用于上级对下级或强势者对弱势者的情境中。