Also means
to hone, to stimulate
Usage Note
Aiguiser applies to both physical sharpening (aiguiser un couteau — to sharpen a knife) and figurative stimulation (aiguiser l'appétit — to whet the appetite; aiguiser l'esprit — to sharpen the mind). The noun aiguisoir means a knife sharpener; a aiguiseur is the person who sharpens blades.
Examples
"Il faut aiguiser ce couteau."
Natural Translation
This knife needs sharpening.
Literal Translation
One must sharpen this knife.

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