English
intrapluvial
From intra- + pluvial.
Proto-Indo-European *h₁én ‘in’
Proto-Indo-European *h₁énteros ‘inside, within’
Latin *interus
Latin intrā ‘within’
English intra-
Proto-Indo-European *plew- ‘to flow, float, wash’
…
Latin pluvia ‘rain’
Latin pluviālis ‘pertaining to rain’
Middle French pluvial
French pluvial ‘pluvial, (relational) rain-’
English pluvial
Today it means
adj Within a pluvial period
Language periods are conventional ranges, not dates for this word.
Etymograph / intrapluvial