adj (1)锋(锐)利的，尖的(having a thin edge that can cut or a point that can pierce)：a～axe/knife/sword 一把锋利的斧子/刀子/剑; a～pin/needle 一枚尖利的大头针/缝衣针;These roses have～thorns. 这些玫瑰有尖刺。You can't write neatly if your pencil isn't～. 如果你的铅笔不尖你就写不工整。〖同〗pointed;〖反〗dull，blunt;

(2)急剧(转)的((of a change in direction)sudden，abrupt)：a～bend/curve in the road 路上的一处急转弯;a～slope 陡坡;make a～left turn 向左急转弯;〖同〗sudden，abrupt，extreme;〖反〗gradual，gentle;

(3)突然(急剧)的(steep and sudden)：a～rise/fall/drop in prices 物价急剧上涨/下跌/下跌;a～food-price increase 食品价格的急剧上涨;a～rise in crime 犯罪率急剧上升;a～drop in temperature 温度急剧下降;〖同〗sudden，abrupt，rapid，extreme;〖反〗gradual，gentle;

(4)鲜明(清楚)的，明晰的((of pictures，outlines，etc) clear and distinct)：a～photograph/photographic image 反差大的照片/影像;the～outline of the mountain 山峰清晰的轮廓;the～contrast between the lives of the poorest and the richest members of society 社会成员贫富生活明显的反差;in～focus 聚焦准确的;The photograph isn't very～. 照片不是很清晰。～differences of opinion 意见的严重分歧;〖同〗 clear，well-defined;

(5)强烈的，辛辣的，刺鼻的((of tastes or smells) biting)：a～flavour/taste/cheese 辛辣的风味/辛辣的味道/刺鼻的干酪;the～smell of the acid 酸的刺鼻气味;This cheese tastes very～. 这种干酪味道很冲。〖同〗biting，bitter，cutting，piercing;〖反〗mild，sweet;

(6)刺骨的，强(剧)烈的(hurting suddenly and strongly;keen)：a～pain 剧痛;a～frost/wind 寒冷的冰霜/刺骨的风;

(7)尖锐的，刺耳的((of sounds) short，sudden and quite loud;pierce)：a～cry of distress 痛苦的尖叫声;a～crack 尖锐的断裂声;the～blast of the horn 尖历的号声;She has such a～voice. 她的声音如此刺耳。〖同〗shrill，piercing，penetrating，high-toned;〖反〗soft;

(8)敏锐的，机警的(alert or quick to notice or understand;acute)：a～mind/child/intelligence 敏锐的头脑/伶俐的小孩/机智;～eyes/ears 灵敏的眼睛/耳朵;She has a～nose/sense of smell. 她嗅觉灵敏。be～at mathematics 敏于数学;keep a～watch (on the market)/look-out 密切注意(市场动态)/严密警戒;(as)～as a needle 非常聪明;〖同〗keen，acute，quick;〖反〗dull，dim，slow，unaware;

(9)尖刻的，严厉的((of words) intended to hurt;harsh;severe)[A (with)](derog)：～words 刻薄的言词;a～criticism/rebuke/remark/scolding 尖锐的批评/严厉的指责/刻薄的言语/严厉的申斥;be～with sb 训斥某人;His～words hurt her. 他尖刻的言词刺痛了她。He could bear his wife's～tongue no longer. 他再也不能忍受他妻子那刻薄的话语。a～-tongued woman说话刻薄的女人;〖同〗 harsh，unkind，bitter，severe;〖反〗gentle，kind，tender，polite，warm;

(10)迅速(敏捷)的，活跃的(quick;lively)[通常作 attrib]：go for a～walk 轻快地去散步;a～struggle/contest 激烈的斗争/竞争;a～run 竞争激烈的赛跑;a short，～shower of rain 一阵骤雨;～work 完成得干净利落的工作;

(11)过分精明的，狡猾(不择手段)的(clever，often in a dishonest way)(derog)：a～trader/lawyer/accountant 精明的商人/律师/会计;～practice 不择手段的行径;He is too～for me. 他太狡猾，我对付不了。Sometimes the customer may be～er than the dealer. 有时顾客可能比商人更加精明。〖同〗dishonest，cunning，foxy，tricky;〖反〗direct，straightforward，honest;

(12)时髦的，漂亮的(very stylish;elegant;smart)[通常作attrib](infml)：a～suit 一套时髦的衣服;a very～dresser 衣着漂亮的人;

(13)升(高)半音的，偏高的((of a note，an instrument，etc) raised a semitone;too high in pitch)[无comp]：in the key of F～用升F调;play a C～minor 以升C小调演奏;a～-toned musical instrument 一件高音乐器;(note) sound～(音符)偏高;

look sharp 1)当心：The guide told us to look～because there were rattlesnakes around. 向导告诉我们要当心，因为附近有响尾蛇。2)快点：Bring me the books and look～. 把那些书给我拿来，快点。

→′sharpen v(使)变尖锐(清晰);′sharpener n 削……的用具;′sharper，′cardsharper n(尤指以赌牌行骗的)骗子手;′sharpish adj 相当锋利的;′sharply adv 尖尖地;急剧地;鲜明地;尖刻地;′sharpness n 尖锐;′sharp-′eyed adj 眼快的，视觉敏锐的;′sharpshooter n 神枪手;′sharp-′sighted adj 目光敏锐的;′sharp-′witted adj 机智的，灵敏的，聪明的;

adv(1)整;准时地(exactly at the stated time)[无comp]：Tell him I'll be there at eleven～. 告诉他我将在11点整到那里。〖同〗punctually，precisely，exactly;

(2)突然地(suddenly;abruptly)(infml)：stop～突然停下;turn～left/right 向左/右急转;

(3)(调子)偏高地((of music) above the correct pitch)：sing～唱的调子偏高;

【辨异】sharp与intelligent和keen的区别见 INTELLIGENT。