HONE

PRONUNCIATION: (hohn)

MEANING: noun:
A fine-grained stone or tool for sharpening blades.
A precision tool with a rotating abrasive tip, used to enlarge or smooth a hole.
verb tr.:
To sharpen on a hone.
To enlarge or smooth a hole using a honing tool.
To refine or perfect a skill through long practice.

ETYMOLOGY: From Old English han (stone). Earliest documented use: noun: before 1150, verb: 1400.
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pH ONE - a highly acid solution

HIONE - a Hawaiian ketone (compare HIYONE, a Silver ketone)

HP-ONE - the first prototype hand-held calculator from Hewlett-Packard