(1)锋(锐)利的(sharp at the edge or point)[尤作attrib]：a～knife/blade/edge 锋利的刀/刀片/刀口;a～-edged sword 刃口锋利的剑;〖同〗sharp，fine，paper-thin;〖反〗dull;

(2)敏捷(锐)的;精明的((of the mind and senses) highly sensitive)：a～sense of smell 灵敏的嗅觉;a～mind/wit/intelligence 敏捷的头脑/机敏的神智/极强的脑力;the～eyes of the jackals 豺狼锐利的目光;～eyesight/observers of life 敏锐的眼光/生活敏锐的观察者;His hearing is～. 他的听觉敏锐。〖同〗sharp，penetrating，quick-witted，clever;〖反〗dull;

(3)强(激，热)烈的((of feelings) very strong;deep)：a～desire/appreciation of art/sense of loss/humour 强烈的愿望/很强的艺术鉴赏力/强烈的失败感/很强的幽默感;〖同〗eager，earnest，impassioned，zealous;

(4)激(浓)烈的(intense，sharp，fierce)：a～football match/struggle for power 激烈的足球比赛/权力斗争;～sarcasm/competition 尖刻的讽刺/激烈的竞争;〖同〗intense，sharp，fierce;

(5)热衷(心，切)的，渴望的(eager or enthusiastic)[A+to-inf，A+that]：a～golfer/sportsman/swimmer 热心的高尔夫球手/运动爱好者/游泳者;be～to enlist in the army/to get a job 渴望参军/得到一份工作;be not～for one's son to enlist in the army 不愿意自己的儿子参军;He's～that Tom should marry Jennie. 他很希望汤姆和珍妮结婚。〖同〗eager，enthusiastic;

(6)寒冷刺骨的(very cold and biting)：a～wind/frost 刺骨的寒风/霜寒;The air outside was～.外面空气寒冷。

(7)价格低廉的;因廉价而有竞争力的((of prices) low;good for buyers)(BrE);

keen on sth/sb 热衷于;对 …… 着迷;喜爱(infml)：be～on politics 热衷于政治;be～on the girl next door/detective stories 喜欢隔壁的那个姑娘/侦探小说;be～on going abroad 渴望出国;

→′keenly adv 渴望地;强烈地;锐利地;′keenness n 敏捷;强烈;渴望;

【辨异】keen与anxious和eager的区别见ANXIOUS。