1. in a way that penetrates sharply through something
2. in an extremely intense or acute manner

Examples

• The wind blew piercingly through the thin jacket.
• She looked at him piercingly, as if trying to read his thoughts.
• The alarm sounded piercingly in the quiet morning air.
• His piercingly blue eyes seemed to see right through her.
• The cold air hit them piercingly as they stepped outside.
• She spoke piercingly about the injustices she had witnessed.