1560s, "one who makes sharp," agent noun from obsolete verb sharp "to make sharp" (see sharp (adj.)). Meaning "swindler" is from 1680s, probably a variant of sharker (see shark (n.)). Shortened form sharpie is from 1942, also probably involving the "sharply dressed" sense of the adjective.
权威例句
1. When you buy new pens, get one with a sharper point.
买新钢笔时要买尖儿比较尖的.
2. Going out, the same Broadway taught her a sharper lesson.
从剧院里出来后, 还是这条百老汇大街给她上了更为深刻的一课.
3. Now a sharper lash of wind cut down and they huddled closer.
这时,刮起了一阵更刺骨的寒风,他们靠得更拢了.
4. As children grow older, their cognitive processes become sharper.
孩子们越长越大,他们的认知过程变得更为敏锐。
5. The tip can be ground to a much sharper edge to cut smoother and faster.