frowned
v. B2 Upper Intermediate US //ˈfɹaʊnd// UK //fɹˈaʊnd// frowned
v. moved your eyebrows together to show you were angry, worried, or thinking hard. It is the facial expression people make when they are unhappy with something.
v. the past tense of 'frown'; refers to the contraction of the brow to express displeasure, concentration, or disapproval. Often used with the preposition 'at' to indicate the object of disapproval.
He frowned when he saw the messy room.
The teacher frowned at the noisy students until the classroom became silent.
She frowned at the complex data on the screen, trying to identify the source of the calculation error that had delayed the project.
Usage
Often takes the preposition 'at' when directed toward a person or situation.