sharpen | WordDisk

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• make or become sharp or sharper.

• "she sharpened her pencil"

Similar: make sharp/sharper, hone, whet, strop, grind, file, edge, acuminate,

Opposite: blunt,

• improve or cause to improve.

• "they've got to sharpen up in front of the goal"

Similar: improve, brush up, polish up, better, enhance, hone, refine, fine-tune, perfect,

• raise the pitch of (a note) by a semitone.