English

intraquartile

From intra- + quartile.

Proto-Indo-European *h₁én ‘in’

Proto-Indo-European *h₁énteros ‘inside, within’

Latin *interus

Latin intrā ‘within’

Medieval Latin quartilus

Middle French quartil

Today it means

adj Within a quartile.

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

Etymograph / intraquartile