τοὐναντίον
From LSJ
German (Pape)
[Seite 1132] zsgzgn statt τὸ ἐναντίον, Ar. Plut. 14, u. in att. Prosa überall.
Greek (Liddell-Scott)
τοὐναντίον: κατὰ κρᾶσιν ἀντὶ τὸ ἐναντίον, Ἀριστοφ. Πλ. 1047, Θουκ., κλπ.
French (Bailly abrégé)
crase att. p. τὸ ἐναντίον.
English (Strong)
contraction for the neuter of ὁ and ἐναντίον; on the contrary: contrariwise.