8
解説 Definition
eight は数字の8を表す語です。数を数えるときや、年齢・時刻・番号などを表すときに使います。
Eight is the number represented by 8, coming after seven and before nine. It is used for quantities, ages, times, positions, and labels involving that number.
覚え方のコツ Memory Tip
eight は数字の8で、発音は /eɪt/。綴りの gh は発音しないため、音が同じ ate「eat の過去形」と文脈で区別する。eight pencils、eight years old、at eight のように、個数・年齢・時刻の三場面をまとめて覚える。octopus の oct- も「8」を表す同系の要素。
Eight names the number 8 and is pronounced /eɪt/; the letters gh are silent. Connect it with three everyday patterns: eight pencils for quantity, eight years old for age, and at eight for time. It sounds exactly like ate, the past tense of eat, so grammar and context reveal which word is intended: “I ate” describes an action, while “eight apples” gives a number. The element oct- in words such as octopus also carries the historical idea of eight.
例文
I have eight pencils.
私は鉛筆を8本持っています。
She is eight years old.
彼女は8歳です。
The class starts at eight.
授業は8時に始まります。
eight の類義語・関連語
紛らわしい語
eight の語源・成り立ち Etymology
古英語 eahta、印欧祖語 *oḱtṓw が語源。ラテン語 octo、ギリシャ語 oktō も同根で、octopus（8本足）や October（古代暦の8番目の月）に残る。英語では語頭の母音が変化し eight の綴りになった。
Eight descends from Old English eahta and ultimately from the Proto-Indo-European word conventionally reconstructed as *oḱtṓw. Cognates include Latin octo and Greek oktō, both meaning “eight.” Their form survives in English elements such as oct- in octopus. October also contains this element because it was the eighth month in an early Roman calendar. English underwent regular sound and spelling changes that produced modern eight, whose gh is now silent.
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