Dictionary entry

ἀθροίζω

G. Abbott-Smith's A Manual Greek Lexicon of the New Testament

ἀθροίζω

(< ἀθρόος, assembled in crowds, MM, VGT, s.v.; < θρόος, a noise, tumult), [in LXX chiefly for קבץ;]

to gather, assemble: Lk 24:33.†