Medea, betrayed, lets loose at the injustice.

Merita contempsit mea qui scelere flammas viderat vinci et mare?

Has he despised my merits—who by treachery had seen flames and sea to be conquered?

Merita mea: my merits

Contempsit: he despised

Qui: who

Scelere: by treachery

Flammas: flames

Viderat: had seen

Vinci: to be conquered

Et mare: and sea