I.
a.
1.
Acute, keen, trenchant.
2.
Pointed, peaked, ridged.
3.
Sagacious, apt, shrewd, astute, acute, penetrating, subtle, perspicacious, discerning, discriminating, ingenious, inventive, witty, quick, clever, ready, smart, clear, sharp-sighted, quick-sighted, keen-eyed, keen-witted, sharp-witted, clear-sighted, long-headed, cunning.
4.
Subtle, acute, witty, astute, shrewd, nice.
5.
Biting, pungent, hot, burning, stinging, mordacious, acrid, sour, bitter, acid, poignant, piquant, high-flavored, high-seasoned.
6.
Severe, harsh, acrimonious, keen, sarcastic, caustic, cutting, tart, pointed, biting, trenchant.
7.
Rigid, cruel, hard, severe.
8.
Keen, eager, hungry.
9.
Distressing, poignant, intense, very painful, afflicting, severe, violent, sore, acute, keen, piercing, subtile, excruciating.
10.
Pinching, piercing, nipping, biting.
11.
Strong, eager, fierce, ardent, violent, fiery, impetuous.
12.
Gritty, hard.
13.
Lean, thin, emaciated, meagre.
14.
Shrill, high, piercing.
15.
Keen, penetrating, piercing, severe, attentive, vigilant.
16.
Shrewd, exacting, close.
II.
v. a.
Sharpen, make keen.