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Improper simply means not proper — not correct, not suitable, or not following the right way of doing something. It can be about behavior (improper conduct, like being rude or breaking a rule) or about something being used the wrong way (improper use of a machine). In math class, students also meet "improper fraction," which just means a fraction where the top number is bigger than the bottom one, like 7/4.
不恰當的；不正確的；（數學）假分數（improper fraction）
組成im- (not) + proper — the prefix "im-" flips the word to its opposite, the same pattern as "possible → impossible."
同家族的字
- properthe opposite — "improper" is simply "not proper," made with the negative prefix im-
原始詞典資料8 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。
improperadj詞源 1/ɪmˈpɹɒp.ə/
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Unsuitable to needs or circumstances; inappropriate; inapt.
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Not in keeping with conventional mores or good manners; indecent or immodest.
- improper conduct
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Not according to facts; inaccurate or erroneous.
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Not consistent with established facts; incorrect.
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Not properly named; See, for example, improper fraction.
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obsoleteNot specific or appropriate to individuals; general; common.
- Not to be adorned with any art but such improper ones as nature is said to bestow, as singing and poetry.
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mathematicssciencesOf a complex random variable, correlated with its conjugate.
improperverb詞源 2
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obsoleteTo appropriate; to assign (something, to someone) as a possession or prerogative.
- He would in like manner improper and inclose the sunbeams to comfort the rich and not the poor.
- For quotations using this term, see Citations:improper.
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。