間隔
解説 Definition
intervals は interval（間隔、合間）の複数形です。時間や距離の区切りがいくつもある場合に使われ、定期的な間隔を表すこともあります。
The plural of interval, referring to two or more spaces or periods separating events, objects, points, or actions. It is often used for repeated, regular divisions of time or distance, as in buses arriving at ten-minute intervals.
覚え方のコツ Memory Tip
interval「間隔、合間」に -s を付けた複数形で、語末は /z/ と発音します。inter-「間に」から、二つの時点や地点の間の空きを思い浮かべましょう。at ten-minute intervals「10分間隔で」、at regular intervals「一定間隔で」のように、複数の繰り返す区切りに使います。
Intervals is the regular plural of interval, formed by adding -s, pronounced /z/ here. The prefix inter- means “between,” so imagine the spaces between several buses, medicine doses, or trees. Because the noun is plural, it often describes a repeated series of gaps rather than one isolated pause. Learn the common expressions at regular intervals, at equal intervals, and at ten-minute intervals. An interval is the gap itself; a schedule or sequence may contain many intervals.
例文
The buses come at ten-minute intervals.
バスは10分間隔で来ます。
Take the medicine at regular intervals.
その薬は決まった間隔で飲んでください。
Trees were planted at equal intervals along the road.
道路沿いには木が等間隔に植えられていました。
intervals の類義語・関連語
intervals の語源・成り立ち Etymology
ラテン語 intervallum（城壁間の空間）が語源。inter-（間に）+ vallum（城壁・柵）に分解でき、元は防塁と防塁の間の距離を指した。そこから時間的・空間的な「隔たり・間隔」の意味に広がった。関連語: intervene（間に入る）、valley（谷＝vallumと同根）。
Intervals is the plural of interval. Interval comes through French from Latin intervallum, originally referring to the space between defensive earthworks or ramparts. It is traditionally analyzed with inter-, “between,” and vallum, “rampart or palisade.” The physical meaning of a space between barriers broadened to any separation in distance and then to a period separating events or actions. English forms the plural regularly by adding -s.
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