P. and V. ἀφορμή, ἡ.
starting point in a race: (also Met.), Ar. and V. βαλβίς, ἡ, P. ὕσπληξ, ἡ.
come to the point whence starts the sorrow of your life: V. ἕρπε πρὸς βαλβῖδα λυπηρὰν βίου (Euripides, Medea 1245).
beginning: P. and V. ἀρχή, ἡ.
source: P. and V. ἀρχή, ἡ. πηγή, ἡ (Plato), ῥίζα, ἡ.
cause: P. and V. αἰτία, ἡ, Ar. and P. αἴτιον, τό.