1. (adjective) having keenness and forcefulness and penetration in thought, expression, or intellect

• searching

2. (adjective) characterized by or full of force and vigor

• hard-hitting

3. (adjective) clearly or sharply defined to the mind

• clear-cut
• distinct

1. (adjective) having keenness and forcefulness and penetration in thought, expression, or intellect

• intelligent

2. (adjective) characterized by or full of force and vigor

• effective
• effectual
• efficacious

3. (adjective) clearly or sharply defined to the mind

• clear

1. (adjective) having keenness and forcefulness and penetration in thought, expression, or intellect

• incisiveness
• trenchancy

2. (adjective) clearly or sharply defined to the mind

• clearcutness
• preciseness
• distinctness
• sharpness
• incisiveness
• trenchancy