glower
UK: ˈɡlaʊə | US: ˈɡlaʊər
vi. to look or stare with anger or sullenness
n. an angry or sullen look or stare
The word "glower" originates from Middle English glouren, meaning "to glow or stare fiercely," likely influenced by Old Norse glóra ("to glow"). The modern sense of "angry staring" evolved from the idea of eyes "burning" with intensity, metaphorically linking the physical act of glowing (like embers) to the emotional state of anger. The suffix "-er" here functions as an agentive marker, turning the action into a noun or verb describing the behavior.
She glowered at him after he interrupted her speech.
The teacher’s glower silenced the noisy classroom.
His face darkened into a glower when he heard the news.
Despite her glower, he continued teasing her.
The boss’s habitual glower made employees uneasy.