perspicacious.

Quick to notice and understand what is not immediately obvious.

Use it for

Words that belong together

• perspicacious observer
• perspicacious judgment

On the page

A perspicacious observer detected the hesitation.

Her perspicacious judgment identified the real obstacle.

Usage notes

Primary category: literary. Forms: Comparative more perspicacious; superlative most perspicacious where gradation is meaningful. Legacy lexical fields mirror sense 1 only. Use numbered sense fields for all meanings.