interval
inter- ‘between’ + vallum ‘rampart’
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noun
1. an intervening time or space:
«…間の» (時間･空間などの)間隔
e.g. after his departure, there was an interval of many years without any meetings
e.g. the intervals between meals were very short.
a component of activity in interval training:
e.g. use one day a week for short, sprint intervals.
2. a pause or break in activity:
合間, 休止期間 «between»
e.g. an interval of mourning.
British an intermission separating parts of a theatrical or musical performance.
｟主に英｠ (演劇･コンサートなどの)休憩時間, 幕間（まくあい）(｟主に米｠ intermission)
a break between the parts of an athletic contest:
(程度の)隔たり
e.g. United led 3-0 at the interval.
3. a space between two things; a gap.
4. the difference in pitch between two musical sounds.
〘楽〙 音程
PHRASES
at intervals
1. with time between; not continuously:
e.g. the light flashed at intervals.
2. with spaces between:
e.g. the path is marked with rocks at intervals.
DERIVATIVES
intervallic |ˌin(t)ərˈvalik| adjective
ORIGIN
Middle English: from Old French entrevalle, based on Latin intervallum ‘space between ramparts, interval’, from inter- ‘between’ + vallum ‘rampart’.