An agent noun from the verb 'to worship' (prostrate, bow down), describing someone who worships. Jesus uses it in John 4:23 declaring that true worshipers will worship the Father in spirit and truth. The noun identifies people characterized by worship—not occasional participants in religious ritual but those defined by genuine prostration before God. The emphasis on 'true' worshipers implies there are false ones—those whose worship is merely external form without internal reality.