'Shēng sè jù lì' literally means 'voice and expression both severe.' It describes someone who is stern, harsh, or intimidating in both tone of voice and facial expression—conveying strong disapproval, anger, or authority all at once. The word combines 声 (voice/sound), 色 (facial expression or demeanor), 俱 (both/all), and 厉 (severe, strict, fierce). It emphasizes the unified intensity of vocal and visual cues, not just one aspect.

This idiom is commonly used to depict authority figures—such as teachers, parents, or officials—reprimanding others, especially in formal or disciplinary contexts. It carries a slightly literary or formal register and often implies the speaker’s intention to intimidate or assert control. While it can describe genuine anger, it’s also used when someone adopts a deliberately stern front to command respect or enforce rules.