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An imponderable is something you cannot weigh, measure, or work out exactly. People use it for the parts of a problem that numbers cannot catch: how a crowd will feel, how lucky a team will be, what a person will do when they are afraid. It can be a noun — the imponderables of a long war — or a describing word: an imponderable question. The word is formal, a little in daily talk. You hear it from writers and commentators who want to admit that some things stay unknown. Though actually, it does not mean “too hard to think about,” and it does not mean “.” Ponder here is closer to weighing than to . An imponderable can matter a great deal; you simply cannot put a clean number on it.
難以估量的（因素、事物）
組成im- (not) + ponderable (able to be weighed or judged). Ponderable comes from ponder, originally “to weigh.”
同家族的字
- ponderableimponderable is im- (not) + ponderable
- ponderthe older sense is “to weigh”; that weighing idea sits inside both words
原始詞典資料5 筆記錄
以下是外部詞典記錄的用法，原文照列，我們還沒有寫成教學內容。上面的說明才是我們自己寫的；有些用法可能上面已經講過了。
imponderableadj/ɪmˈpɒndəɹəbl/
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Not ponderable; without sensible or appreciable weight; incapable of being weighed.
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Difficult or impossible to comprehend or evaluate.
imponderablenoun/ɪmˈpɒndəɹəbl/
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natural-sciencesphysical-sciencesphysicsA substance or body, which is not ponderable, i.e., which not does not having a detectable amount of matter or measurable mass. An imponderable substance or body; specifically, in the plural, a name formerly applied to heat, light, electricity, and magnetism.
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An imponderable question.
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A factor that cannot be anticipated.
- One key imponderable is the attitude of the companies that will no longer have a role in the business. It is worth noting here that several have already thrown the towel in or been gently pushed out, such as Stagecoach and National Express.
資料來源：英文維基詞典 English Wiktionary（CC BY-SA 4.0）。 原文照列，未經改寫。