Erfroren means "frozen" or "frostbitten." While it literally describes something physically frozen, it's used metaphorically in this song to convey a deep sense of emotional coldness and despair.
In the lyrics, "Ist die Hoffnung längst erfroren" (Is hope long since frozen), it paints a vivid picture of hope being so utterly lost and lifeless that it has become completely frozen. This powerful imagery makes it a memorable and evocative word.
Beatrice Egli opens mid-doubt: 'Wenn du denkst, es geht nicht weiter' [When you think there's no way forward]. Her answer is arithmetic, not a pep talk: 'Sieben mal Herz, sieben mal Schmerz, sieben Tränen, sieben mal Glück, sieben mal Pech' [seven times heart, seven times pain, seven tears, seven times luck, seven times bad luck]. Heart and hurt get counted out in equal shares, so one never outnumbers the other for long.
The chorus keeps circling back to that promise: 'Doch am Ende kehrt das Glück auch zu dir, mein Freund, zurück' [But in the end, luck comes back to you too, my friend]. Her advice for getting there isn't a plan, just nerve: 'Hab etwas Mut, und alles wird gut' [Have a little courage, and everything will turn out fine].