IPA: /ˈʌltrəˌʃɑrp/
KK: /ˈʌltrəˌʃɑrp/
Very sharp, often used to describe blades or tools that can cut easily and precisely.
The ultrasharp knife made slicing through the vegetables effortless.
Ultrasharp is formed from "ultra-" (meaning beyond or extreme) and "sharp" (from Old English "scearp", meaning having a fine edge or point). The word "ultrasharp" describes something that is extremely sharp or has an exceptionally fine edge.
Think of 'beyond' ('ultra-') and 'having a fine edge' ('sharp') to remember that 'ultrasharp' means extremely sharp.
No commonly confused words.