Related Clues:

• Like an eagle's vision
• Like some observations
• Well-sharpened
• Type of triangle
• Shrewd or savvy
• Sharp, as an appetite
• Like angles less than 90 degrees
• Less than 90 degrees, in geometry
• Percipient
• Tough to outwit
• Fresh from honing
• Severe, as pain
• It's never right
• Like severe pain
• Strongly felt