διπλήζω

From LSJ

φιλεῖ δέ τοι, δαιμόνιε, τῷ κάμνοντι συσπεύδειν θεός → you know, my good fellow, when a man strives hard, a god tends to lend him aid

Source

Spanish (DGE)

duplicar, multiplicar por dos, mat. en PCair.10758 (VI d.C.).