Where does “pentecoste” come from?
pentecoste (Latin) comes from Ancient Greek πεντηκοστή, from Ancient Greek πεντηκοστός, from Ancient Greek πεντήκοντα, from Proto-Indo-European penkʷēḱomth₂, from Proto-Indo-European *pénkʷedḱomt.
Ancestry of “pentecoste”, step by step