nebulous

/ˈnebjələs/📚 21134GREsat
If you describe something as nebulous, you mean that it is vague and not clearly defined or not easy to describe. 朦胧的; 模糊的

adjective [原级]朦胧的;星云的,星云状的

Music is such a nebulous thing.
音乐是如此朦胧之物。

nebulous

-ous ⌜ 表示具有某种性质的 - indicating having the quality of ~ ⌟
neb(云, 雾) + bl + ous → 云状的
单词造句:
网友用“Nebulous”造句精选
The notions we children were able to form of the great world beyond were exceedingly nebulous. 我们这些孩子对外部世界所能形成的认识是非常模糊的。
Performance is a nebulous issue. 性能是一个较为模糊的问题。