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If you are forgetful, you often let things slip: names, keys, why you walked into a room. It is a soft everyday word, kinder than careless. People use it about themselves with a small smile (“I’m so forgetful today”), and they also use it for a stretch of time, not only for a type of person. It does not, by itself, mean a serious illness; when doctors talk about a medical problem they usually reach for other words. You can be forgetful about small things and still be careful about big ones. The feeling is “it keeps falling out of my mind,” not “I do not care.”
健忘的、容易忘東忘西的
組成forget + -ful (full of that quality). From Middle English (the adjective is known from the old noun forgetfulness / forȝetfulnesse).
同家族的字
- forgetthe verb this describing-word is built on
- forgetfulnessthe noun for the same habit or state
- forgetfullythe adverb: doing something in this way
原始詞典資料2 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。
forgetfuladj/fərˈɡɛtfəl/
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Unable to remember things well; liable to forget.
- Nor has Dalua part or mention in the antique legend. Like other ancient things, this divinity hath come secretly upon us in a forgetful time, new and strange and terrible, though his unremembered shadow crossed our way when first we set out on our long travel, in the youth of the world.
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mathematicssciencesDropping some of the input's structure or properties before producing an output.
- a forgetful mapping; a forgetful functor
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。