illusion

il-,进入，使，-lus,玩乐，玩耍，词源同ludic,elude,elusive.引申词义玩弄，欺骗，虚幻。

illusion

illusion: [14] The notion of ‘play’ is at the etymological heart of illusion (as indeed of its close relatives allusion [16], delusion [15], and elude [16]). It came via Old French from Latin illūsiō, a derivative of illūdere ‘make fun of’. This was a compound verb formed from the prefix in- and lūdere ‘play’ (source of English ludicrous [17]). In classical Latin illūsiō meant ‘mockery’, and no semantic shift seems to have taken place until post-classical times, when it moved to ‘deceit’ (a sense originally taken over by English).
=> allusion, delusion, elude, ludicrous

illusion (n.)

mid-14c., "act of deception," from Old French illusion "a mocking, deceit, deception" (12c.), from Latin illusionem (nominative illusio) "a mocking, jesting, irony," from illudere "mock at," literally "to play with," from assimilated form of in- "at, upon" (see in- (2)) + ludere "to play" (see ludicrous). Sense of "deceptive appearance" developed in Church Latin and was attested in English by late 14c. Related: Illusioned "full of illusions" (1920).

1. Sloping walls on the bulk of the building create an optical illusion.

大楼主体的斜墙给人造成一种视错觉。

来自柯林斯例句

2. She laboured under the illusion that I knew what I was doing.

她有一个错觉，以为我知道自己在做什么。

来自柯林斯例句

3. This eerie calm is an illusion.

这种怪诞的平静是一种假象。

来自柯林斯例句

4. The sun appears to go round the Earth, but it's an illusion.

太阳看起来好像绕着地球转, 但这只是个错觉.

来自《简明英汉词典》

5. The mirrors all round the walls give an illusion of greater space.

墙壁周围的镜子造成一种较大空间的假象.

来自《简明英汉词典》