使用済み
解説 Definition
used は use（使う）の過去形・過去分詞です。「使用済みの」「中古の」という形容詞的な意味でもよく使われます。
The past tense and past participle of “use.” Before a noun, it commonly describes something that has already been used or owned, such as a used cup or a used car, and may therefore mean secondhand.
覚え方のコツ Memory Tip
原形 use に -ed を付けた過去形・過去分詞で、語末の e は重ねず used とし、「使った」では /juːzd/ と発音します。used book、used bike、used cups では過去分詞が形容詞化し「使用済みの・中古の」です。used to「以前は〜した」の used は通常 /juːst/ となる点も区別しましょう。
Begin with the verb “use.” Because it already ends in e, add only d to form “used”; in the ordinary past-tense sense it is pronounced /juːzd/. In phrases such as “a used book,” “a used bike,” or “used cups,” the participle works like an adjective and means previously owned or already put to use. Contrast this with “used to,” meaning that something happened regularly in the past. In that construction, the expression is normally pronounced with /st/. Keeping the examples “used a tool,” “used cups,” and “used to walk” separate will clarify the three common patterns.
例文
This is a used book.
これは中古の本です。
Please put used cups here.
使用済みのカップはここに置いてください。
He bought a used bike.
彼は中古の自転車を買いました。
used の類義語・関連語
used の語源・成り立ち Etymology
古フランス語 user（使う）を経て、ラテン語 ūtī（用いる、利用する）に由来。関連語：use, utility（有用性）、utilize。ラテン語の原義は「自分の利益のために活用する」で、道具や資源を目的に合わせて役立てるという意味が核にある。
“Used” is formed by adding the past-tense and participial ending “-ed” to “use.” “Use” entered English through Old French “user” and ultimately derives from Latin “ūtī,” meaning to use, employ, or make use of. Its participle naturally developed an adjectival sense: an object that has been employed before is “used,” and something previously owned may therefore be sold as secondhand.
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