From athleo; a struggle (figuratively) -- fight.
see GREEK athleo
STRONGS NT 119a: ἀθροίζωἀθροίζω: perfect passive participle ἠθροισμένος; (from ἀθρόος, equivalent to θρόος (a noisy crowd, noise), with a copulative (see A, a, 2)); to collect together, assemble; passive to be assembled, to convene: Luke 24:33 L T Tr WH. ((Sophocles) Xenophon, Plato, Polybius, Photius, others; O. T. Apocrypha; sometimes in the Sept. for קָבַץ.) (Compare: ἐπαθροίζω, συναθροίζω).