English
Pentecostal
From Pentecost + -al.
A compound of Pentecost + -al
Proto-Indo-European *penkʷēḱomth₂
…
Ancient Greek πεντηκοστή ‘fiftieth’
Ecclesiastical Latin pentēcostē
Old English Pentecosten
Middle English Pentecoste ‘feast of the descent of the Holy Spirit,…’
English Pentecost
Today it means
adj Of, or relating to Pentecost.
Language periods are conventional ranges, not dates for this word.
Etymograph / Pentecostal