尖利

sharp / keen / cutting / shrill / piercing

sharp / favorable / advantage / benefit / profit / interest / to do good to / to benefit

point (of needle) / sharp / shrewd / pointed

pointed; tapering; sharp / (of a sound) shrill; piercing / (of one's hearing, sight etc) sharp; acute; keen / to make (one's voice) shrill / sharp point; tip / the best of sth; the cream of the crop