Being scolded by the boss in front of everyone humiliates him deeply.

humiliates 是动词 humiliate 的第三人称单数形式。humiliate 由词根 humil-（来自拉丁语 humilis，意为"低下的"）和动词后缀 -ate 组成，意思是"使感到羞耻、使丢脸"。humiliates 表示"使某人感到羞辱"的行为。