Roget's 21st Century Thesaurus, Third Edition Copyright © 2013 by the Philip Lief Group.

WORD ORIGIN

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). Metaphoric sense of "gap in time" was present in Latin.

MORE RELATED WORDS FOR AT INTERVALS

Roget's 21st Century Thesaurus, Third Edition Copyright © 2013 by the Philip Lief Group.