toothed
歯のある
解説 Definition
toothed は「歯のある」「歯状の突起を持つ」という意味の形容詞です。のこぎり、歯車、葉の縁など、実際の歯のようにぎざぎざした部分があるものを説明するときに使われます。
Toothed describes something that has teeth or a row of toothlike projections. It is used for objects such as gears and blades, and for natural structures such as leaves whose edges have small, regular points.
覚え方のコツ Memory Tip
toothed は名詞 tooth「歯」に「〜を備えた」を表す -ed が付いた形容詞で、tooth＋ed と綴ります。発音は /tuːθt/ で、語尾は「イド」になりません。toothed wheel「歯車」、toothed blade「歯のある刃」、toothed leaves「ぎざぎざの葉」のように、本物の歯だけでなく歯状の突起が並ぶ物にも使うと覚えましょう。
Toothed is built transparently from tooth plus the adjective-forming suffix -ed, meaning “provided with.” Its final -ed is pronounced as /t/, not as a separate “id” syllable. Think of three concrete combinations: a toothed wheel whose projections engage another mechanism, a toothed blade that cuts wood, and a toothed leaf with a jagged edge. The “teeth” do not need to be biological; they can be any repeated projections shaped or functioning like teeth. Contrast toothed with toothy, which often describes a person or smile showing many prominent teeth rather than a mechanical or botanical structure.
例文
The machine uses a toothed wheel to move the belt.
その機械はベルトを動かすために歯のある車輪を使っている。
This plant has small toothed leaves.
この植物には小さなぎざぎざの葉がある。
A toothed blade cuts wood more easily than a smooth one.
歯のある刃は、なめらかな刃よりも木を切りやすい。
toothed の類義語・関連語
toothed の語源・成り立ち Etymology
古英語の「tōþ（歯）」に形容詞化接尾辞「-ed（～を備えた）」が結合した単語です。印欧祖語語根*dent-（歯）に由来し、語尾の-edが「性質を有する」状態を表すため「歯や突起がある」と直感的に理解できます。関連語に「dental（歯の）」や「dentate（歯状の）」があります。
Toothed combines tooth with the suffix -ed in its “having or provided with” function. Tooth comes from Old English tōþ and belongs to an ancient Germanic word family. Its deeper Indo-European history is related to the root also represented in Latin dens and English words such as dental, though the Germanic form developed through different sound changes. In toothed, the meaning extends readily from actual teeth to regularly spaced projections on blades, wheels, tools, and leaf margins.
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