why
From LSJ
τὰ καλὰ καὶ συμφέροντα ταῖς ψυχαῖς ἡμῶν καὶ εἰρήνην τῷ κόσμῳ → what is good and profitable to our souls, and for peace to the world
English > Greek (Woodhouse)
adverb
Interrogative: P. and V. τί, τοῦ χάριν (Dem. 490). P. διὰ τί, τοῦ ἕνεκα (Dem. 1104), ἀντὶ τίνος (Plato, Lysis 208E), V. πρὸς τί, ἀντὶ τοῦ, εἰς τί, τί χρῆμα, τίνος ἕκατι, ἐκ τοῦ (Euripides, Electra 246), τίνος χάριν.
for what purpose: P. and V. ἐπὶ τῷ (Sophocles, Ajax 797).