someone with piercing eyes is looking at you and seems to know what you are thinking:
There was mockery now in those piercing blue eyes.
She felt foolish and unsure under his piercing gaze.
He gave her a piercing look.
a sound that is piercing is high, sharp, and unpleasant:
He grinned and let out a piercing whistle.
a piercing scream
a piercing wind is very cold
causing a lot of pain:
She felt a piercing sensation in her arm.
affecting your feelings very deeply in a sad way:
emotion[only before noun]
a piercing moment of regret
It was piercingly cold.
She looked at him piercingly.