μέγας εἶ, Κύριε, καί θαυμαστά τά ἔργα σου → Great are You, O Lord, and marvelous are Your works
SourceSpanish (DGE)
πλῆθος Hsch.
Frisk Etymological English
Grammatical information: n.?
Meaning: πλῆθος H.
Origin: XX [etym. unknown]
Etymology: One connects βύτανα and βύττος, for which I see no ground.