inter-,在内，在中间，相互，-val,墙，词源同wall.原指两堵墙之间的空间，后引申词义间隔，间歇。

interval

interval: [13] The val- of interval represents Latin vallum ‘rampart’ (source of English wall) – so etymologically the word means ‘space between ramparts’. That was the original sense of its Latin ancestor, intervallum, but already in the classical period the metaphorical ‘gap in time, pause’ was developing.
=> wall

interval (n.)

early 14c., from Old French intervalle (14c.), earlier entreval (13c.), from Late Latin intervallum "space, interval, distance," originally "space between palisades or ramparts," from inter "between" (see inter-) + vallum "rampart" (see wall (n.)). Metaphoric sense of "gap in time" was present in Latin.

1. The ferry service has restarted after an interval of 12 years.

时隔12年之后，轮渡服务又重新开通了。

来自柯林斯例句

2. The goal that decided the match came just before the interval.

决定本场比赛结果的进球是在中场休息前一刻打入的。

来自柯林斯例句

3. England were two goals behind at the interval.

中场休息时英格兰队落后两球。

来自柯林斯例句

4. During the interval, wine was served.

幕间休息时有葡萄酒供应。

来自柯林斯例句

5. The interval between major earthquakes might be 200 years.

大地震之间的间隔时间可能有200年。

来自《权威词典》