"Sharpen" Natural Recordings by Native Speakers
To improve or make something more precise or effective by removing flaws and making it more pointed or cutting.
Example: "She sharpened her pencil to write a clear signature."
Synonym: Refine
Antonym: Dull
A shark is a fish with a cartilaginous skeleton and a streamlined, aerodynamic body. It is a marine predator that uses its powerful tail to swim and its sharp teeth to hunt and eat its prey. There are over 500 species of sharks, ranging in size from the dwarf lanternshark, which is less than 20 centimeters long, to the whale shark, which can grow up to 20 meters in length.