keen

adjective

Having a fine, sharp cutting edge or point.

adjective

Having or marked by intellectual quickness and acuity. synonym: sharp.

adjective

Acutely sensitive.

adjective

Sharp; vivid; strong.

adjective

Intense or bracing.

adjective

Pungent; acrid.

adjective

Ardent; enthusiastic.

adjective

Eagerly desirous.

adjective

Great; splendid; fine.