sharpen
UK: ˈʃɑː.pən | US: ˈʃɑːr.pən
vt. to make or become sharp or sharper
vi. to improve or refine a skill or ability
The word "sharpen" combines "sharp," derived from Old English scearp (meaning "cutting, keen"), with the verb-forming suffix "-en," which originates from Old English -nian. This suffix was used to create verbs meaning "to make or become." The logical progression is straightforward: "sharp" (adjective) + "-en" (verbifier) = "to make sharp." Over time, the word expanded metaphorically to include refining skills or abilities.
He used a whetstone to sharpen his knife.
Regular practice will sharpen your writing skills.
The chef sharpened the blade before slicing the vegetables.
Debates help sharpen critical thinking.
The cold air seemed to sharpen her focus.