Word: Pentecostalist
Part of speech: Adjective
Syllables: pen
te
co
sta
list
Definition: of or pertaining to Pentecostalism; the principles and practices of Pentecostal religious groups; characterized by religious excitement and talking in tongues
Morphemes:
Affix: Pentecost
Language: en
PoS: Proper noun
Meaning: Proper noun~ Pentecostal manifestation, such as in a church service.
Etymology Compounds: Affix: πεντηκοστή
Language: grc
Decoded: pentekoste
Meaning: fiftieth 
Affix: -al
Language: en
PoS: Suffix
Meaning: Of or pertaining to. Adjectival suffix appended to various words, often nouns, to make an adjective form. Often added to words of Latin origin, but used with other words also.
Affix: -ist
Language: en
PoS: Suffix
Meaning: one who subscribes to a particular theological doctrine or religious denomination;
Etymology Compounds: Affix: -ίζω
Language: grc
Decoded: -izo
Meaning: -ize, -ise
Affix: -τής
Language: grc
Decoded: -tes
PoS: Suffix
Meaning: With -ύζω verbs.