English

interfirst

From inter- + first.

Proto-Indo-European *h₁én ‘in’

Proto-Indo-European *h₁entér ‘between’

Proto-Italic *n̥ter ‘between’

Latin inter ‘between’

Proto-Indo-European *per- ‘before’

…

Proto-Germanic *furistaz ‘first’

Proto-West Germanic *furist

Old English fyrest

Middle English first

English first

The story

A recent coinage; see usage notes.

adj Between the members of the first pair of specified things (such as premolars or molars).

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

Etymograph / interfirst