1
- having or showing eagerness or enthusiasm热心的, 热切的, 渴望的; 热情的：
a keen gardener
一位热情的园丁
a keen desire to learn.
一种热切的求知欲望。
1.1
- (of activity or feeling) intense（活动）激烈的; （感情）强烈的：
there could be keen competition to provide the service.
提供这种服务可能有激烈的竞争。
1.2
- predic.
keen on
interested in or attracted by (someone or something)对…有兴趣的; 被…吸引的： Bob makes it obvious he's keen on her.
鲍勃明显表示他被她吸引住了。
2
- sharp or penetrating, in particular锋利的; 敏锐的, 尖锐的, 尤指：
2.1
- (of a sense) highly developed（感觉）灵敏的, 敏锐的：
I have keen eyesight.
我的视力敏锐。
2.2
- (of mental faculties) quick to understand or function（智力）机敏的, 聪明的; 敏锐的：
her keen intellect.
她敏锐的理解力。
2.3
- (of the air or wind) extremely cold; biting（空气或风）严寒的; 刺骨的。
2.4
- (of the edge or point of a blade) sharp（刀刃或刃尖）锋利的。
2.5
- poetic/literary (of a smell, light, or sound) penetrating; clear〈诗/文〉（气味、光或声音）有穿透力的; 强烈的; 明净的。
3
- Brit. (of prices) very low; competitive〈英〉（价格）低廉的; 有竞争力的。
4
- predic. N. Amer. informal, dated excellent〈北美, 非正式, 旧〉优秀的, 卓越的, 极好的：
I would soon fly to distant stars-how keen!
我即将飞到遥远的星球上——多美妙啊！
短语
(as) keen as mustard
- Brit. informal extremely eager or enthusiastic〈英, 非正式〉极热心的, 极热切的; 极热情的。
派生词
keenly
adverbkeenness
noun词源
Old English cēne 'wise, clever', also 'brave, daring', of Germanic origin; related to Dutch koen and German kühn 'bold, brave'. Current senses date from Middle English.
no obj.
1- wail in grief for a dead person; sing a keen为死者而痛哭, 哀号; 唱挽歌。
1.1
- usu. as noun keening make an eerie wailing sound发出可怕的呜咽声; 呼啸：
the keening of the cold night wind.
夜晚寒风可怕的呜咽声。
- an Irish funeral song accompanied with wailing in lamentation for the dead（哀哭死者时的）爱尔兰挽歌。
派生词
keener
noun词源
mid 19th cent.: from Irish caoinim 'I wail'.