世事繁雜，難以言說(shuō)之物何其多。“難以用語(yǔ)言表達(dá)”用英語(yǔ)怎么說(shuō)呢?

Je ne sais quoi is something that cannot be adequately described or expressed.

不可言說(shuō)指無(wú)法用語(yǔ)言充分表達(dá)的某物。

Je ne sais quoi是法語(yǔ)“我不知道是什么”的意思，這個(gè)詞表達(dá)的不可言說(shuō)之物多為褒義。

Example：

Although the sculpture had flaws, it also had a certain je ne sais quoi that made it very appealing.

盡管這尊雕塑有瑕疵，但某種無(wú)法言說(shuō)的東西賦予了它魅力。