尖刻

caustic / biting / piquant / acerbic / vitriolic / acrimonious

quarter (hour) / moment / to carve / to engrave / to cut / oppressive / classifier for short time intervals

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