withering glance

昨日の内容は長かったので今日は短めにします。
万次郎は学校にも行かせてもらえます。捕鯨船Howland号の船員の中にもbullyがいましたが、学校にもいます。
"Stow it, Tom," someone in the back called out.
"You stow it or I'll come back there and make you," Tom yelled back.
"Yeah?"
"You know I will."
A fight was narrowly avoided when the teacher reentered. The boys abruptly sat down, and the teacher gave them all a withering glance before continuing.
この時は幸い先生がいてイジメを止めてくれました。 "withering glance" の "wither" は植物が枯れる、しおらさせると言う意味を知っているので大体の意味は想像できますが、辞書で用法を確認します。
・Merriam-Webster's Online Dictionary: to make speechless or incapable of action: stun: withered him with a look
・Macmillan Dictionary: to make someone feel silly or ashamed
・Dictionary.com: to abash, as by a scathing glance: a look that withered him.