1.
A ~ sound is loud and usually high-pitched.
Mary heard the ~ bell of an ambulance...
= piercing
ADJ
2.
If someone gives you a ~ look, it makes you think that they know what you are thinking.
He gazed at me with a sharp, ~ look that made my heart pound.
= piercing
ADJ: usu ADJ n
3.
Someone who has a ~ mind understands and recognizes things quickly and thoroughly.
...a thoughtful, ~ mind...
ADJ: usu ADJ n