English

intratetrad

From intra- + tetrad.

Proto-Indo-European *h₁én ‘in’

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

Latin *interus

Latin intrā ‘within’

Proto-Indo-European *kʷetwóres ‘four’

Ancient Greek τετράς ‘the fourth day of the month’

Today it means

adj Within a tetrad

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

Etymograph / intratetrad