sharpest

Terminating in a point or edge, especially one that can cut easily; not obtuse or rounded.

“A face with sharp features”

Intelligent.

“My nephew is a sharp lad; he can count to 100 in six languages, and he's only five years old.”

Higher than usual by one semitone (denoted by the symbol ♯ after the name of the note).

Higher in pitch than required.

“The orchestra's third violin several times was sharp about an eighth of a tone.”

Having an intense, acrid flavour.

“Milly couldn't stand sharp cheeses when she was pregnant, because they made her nauseated.”

Sudden and intense.

“A pregnant woman during labor normally experiences a number of sharp contractions.”

Illegal or dishonest.

“Michael had a number of sharp ventures that he kept off the books.”

Keenly or unduly attentive to one's own interests; shrewd.

“a sharp dealer;  a sharp customer”

Exact, precise, accurate; keen.

“You'll need sharp aim to make that shot.”

Offensive, critical, or acrimonious.

“When the two rivals met, first there were sharp words, and then a fight broke out.”

Stylish or attractive.

“You look so sharp in that tuxedo!”

Observant; alert; acute.

“Keep a sharp watch on the prisoners. I don't want them to escape!”

Forming a small angle; especially, forming an angle of less than ninety degrees.

“Drive down Main for three quarters of a mile, then make a sharp right turn onto Pine.”

Steep; precipitous; abrupt.

“a sharp ascent or descent; a sharp turn or curve”

(of a statement) Said of as extreme a value as possible.

“Sure, any planar graph can be five-colored. But that result is not sharp: in fact, any planar graph can be four-colored. That is sharp: the same can't be said for any lower number.”

Tactical; risky.

Piercing; keen; severe; painful.

“a sharp pain; the sharp and frosty winter air”

Eager or keen in pursuit; impatient for gratification.

“a sharp appetite”

Fierce; ardent; fiery; violent; impetuous.

Composed of hard, angular grains; gritty.

Uttered in a whisper, or with the breath alone; aspirated; unvoiced.

Hungry.