1. enter- (inter-) + -tain + -er.
2. => keep or hold someone's mind among many different and interesting things.
=> keep or hold something like amusing or treat between / among people.
=> keep or hold something attractive or interesting among / in one's mind.
3. 所谓花花世界、五彩缤纷、其乐无穷，由此引申义：娱乐，助兴。
4. 类推：The original Old French version of enterprise was emprise.
5. => The original Old French version of entertain was *emtenir(*emtain).
6. 因此这里的enter-前缀应该说还含有“in”的含义，这还可以从单词enter及该前缀的源头可以看出来。
7. enter- "in" => hold or keep one's mind in something, hold (in), keep (in), maintain (in).

1. Some have called him the greatest entertainer of the twentieth century.

有人曾称他为20世纪最伟大的艺人。

来自柯林斯例句

2. The entertainer didn't fool us with his conjuring.

那个艺人变的戏法没有骗到我们.

来自《简明英汉词典》

3. A number of well - known public characters were cleverly hit off by the entertainer.

一些著名的社会人士被这位演员模仿得惟妙惟肖.

来自《简明英汉词典》

4. He was a great entertainer but going insane.

虽然他还是那样善于逗趣,但他的神经显然越来越不正常了.

来自辞典例句

5. The engagement of a well - known entertainer obviously gives the hotel an excellent promotional opportunity.

能邀请到著名的表演者显然是旅馆的最好宣传.

来自辞典例句