"sharpest" in the adjective sense
1. crisp, sharp
of something seen or heard) clearly defined
"a sharp photographic image"
"the sharp crack of a twig"
"the crisp snap of dry leaves underfoot"
2. acuate, acute, sharp, needlelike
ending in a sharp point
3. acute, discriminating, incisive, keen, knifelike, penetrating, penetrative, piercing, sharp
having or demonstrating ability to recognize or draw fine distinctions
"an acute observer of politics and politicians"
"incisive comments"
"icy knifelike reasoning"
"as sharp and incisive as the stroke of a fang"
"penetrating insight"
"frequent penetrative observations"
4. astute, sharp, shrewd
marked by practical hardheaded intelligence
"a smart businessman"
"an astute tenant always reads the small print in a lease"
"he was too shrewd to go along with them on a road that could lead only to their overthrow"
5. sharp, sharp-worded, tart
harsh
"sharp criticism"
"a sharp-worded exchange"
"a tart remark"
6. shrill, sharp
having or emitting a high-pitched and sharp tone or tones
"a shrill whistle"
"a shrill gaiety"
7. abrupt, precipitous, sharp
extremely steep
"an abrupt canyon"
"the precipitous rapids of the upper river"
"the precipitous hills of Chinese paintings"
"a sharp drop"
8. sharp
keenly and painfully felt as if caused by a sharp edge or point
"a sharp pain"
"sharp winds"
9. sharp
having or made by a thin edge or sharp point suitable for cutting or piercing
"a sharp knife"
"a pencil with a sharp point"
10. sharp
of a musical note) raised in pitch by one chromatic semitone
"C sharp"
11. sharp
very sudden and in great amount or degree
"a sharp drop in the stock market"
12. sharp
quick and forceful
"a sharp blow"
Source: WordNet® (An amazing lexical database of English)
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