削尖
Sharp \Sharp\, v. t. [imp. & p. p. {Sharped}; p. pr. & vb. n.
{Sharping}.]
1. To sharpen. [Obs.] --Spenser.
2. (Mus.) To raise above the proper pitch; to elevate the
tone of; especially, to raise a half step, or semitone,
above the natural tone.