דַּלְתֵ֣י פָ֭נָיו מִ֣י פִתֵּ֑חַ סְבִיב֖וֹת שִׁנָּ֣יו אֵימָֽה׃
Who can open the doors of his face? Round about his teeth is terror.
Rashi on Job
the doors of his face They are the lips when he closes his mouth; who can open them?
Rashi on Job
Around his teeth is terror That because of his fright and his terror, no creature can approach his teeth.