delusion

• n.混乱、欺瞞、錯覚、妄想

deludeの「欺く」から。

delusion

delusion: see illusion

delusion (n.)

"act of misleading someone," early 15c.; as a form of mental derangement, 1550s, from Latin delusionem (nominative delusio) "a deceiving," noun of action from past participle stem of deludere (see delude).

Technically, delusion is a belief that, though false, has been surrendered to and accepted by the whole mind as a truth; illusion is an impression that, though false, is entertained provisionally on the recommendation of the senses or the imagination, but awaits full acceptance and may not influence action. Delusions of grandeur, the exact phrase, is recorded from 1840, though the two words were in close association for some time before that.

1. I was under the delusion that he intended to marry me.

私は彼が私と結婚すると勘違いしている。

2.He is under the delusion that he is Napoleon.

彼はナポレオンだと妄想している。

3.He is under a delusion in this matter.

彼はこのことについて誤解している。

4.This was not optimism，it was delusion .

これは楽観ではありません。これは妄想です。

5.It must need be a delusion .

それは幻覚にすぎない。