English

interannual

From inter- + annual.

A compound of inter- + annual

Proto-Indo-European *h₁én ‘in’

Proto-Indo-European *h₁entér ‘between’

Proto-Italic *n̥ter ‘between’

Latin inter ‘between’

Latin annus ‘year’

Latin annuus ‘yearly’

Late Latin annuālis ‘yearly’

Middle English annuel

Today it means

adj Occurring between years, or from one year to the next

Language periods are conventional ranges, not dates for this word.

Etymograph / interannual