A state of depression for which there is no apparent precipitating cause.

没有明显的原因就产生抑郁的一种状态。

youdao

Mr Kellermann's wife reported an apparent suicide according to local media accounts though police declined to comment on the cause of death other than to say that there was no evidence of foul play.

据当地媒体报道，凯勒曼的妻子向警方报告了这一看起来为自杀的事件，但警方拒绝就死因发表评论，仅表示没有不法行为的证据。

youdao

Starfall will no longer cause nearby creatures to become hostile for no apparent reason while the Druid is affected by fear effects.

星落不再在德鲁伊被恐惧时，使得附近的怪物变得没理由的敌对。

youdao

So we are back to uncertainty casting a pall over business investment and growth in Japan, uncertainty made more ominous by the fact that there is no apparent end or solution to its cause.

FORBES: Connect