1
be unpropitious
常用作谓语，描述情况不利。
The timing was unpropitious.
时机不顺遂。
不利的；不吉利的；不合时宜的
先理解核心含义，再看它在真实句子里的用法。
不利的；不吉利的；不合时宜的
Not propitious; unfavourable, untimely.
The timing was unpropitious.
时机不顺遂。
不利的；不吉利的；不合时宜的。
Not propitious; unfavourable, untimely.
The weather was unpropitious for our picnic, so we stayed indoors.
天气对我们的野餐不利，所以我们待在了室内。
They decided to postpone the launch because the market seemed unpropitious.
他们决定推迟发布，因为市场似乎不利。
It was an unpropitious moment to ask for a raise.
那是一个不适合要求加薪的时刻。
常用作谓语，描述情况不利。
The timing was unpropitious.
时机不顺遂。
The weather was unpropitious for sailing.
天气不利于航行。
常用在名词前作定语。
They faced an unpropitious start.
他们面临不吉利的开端。
Not this
The weather was unpropitious to the flight.
Use this
The weather was unpropitious for the flight.
汉语中‘对’可以用于表示‘对于’，而英语中unpropitious后常搭配介词for，表示‘对……不利’。使用to则是错误搭配。
Not this
The unpropitious of the situation made us cancel the trip.
Use this
The unpropitious nature of the situation made us cancel the trip.
Unpropitious是形容词，不能直接用作名词。汉语中形容词可直接作主语或宾语，但英语中需要加上名词或使用名词形式（如unpropitiousness）。这里应补充nature表示‘不利的性质’。
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常与介词 for 或 to 连用，表示‘对…不利的’。
Dictionary facts from ECDICT, WIKTIONARY.