English

intraclass

From intra- + class.

Proto-Indo-European *h₁én ‘in’

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

Latin *interus

Latin intrā ‘within’

Proto-Indo-European *kelh₁- ‘to call’

Latin classis ‘a class or division of the people’

Middle French classe

English class

Today it means

adj Within a class.

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

Etymograph / intraclass