
Glower
Negative Emotion
Glower implies a strong negative emotion, but not necessarily an intention to act on it.
Even though she glowered at the screen, she remained silent during the meeting.
Intensity
Glower suggests more intensity than a frown but less than outright aggression.
His glower could be felt from across the room, though he didn't move an inch.
Silent Disapproval
Glowering often indicates silent disapproval rather than verbal confrontation.
She glowered at the mess her roommate left, choosing not to argue.