unvorhergesehen
From LSJ
ἄλογον δὴ τὸ μήτε μάχης ἄρξασθαι μήτε τοὺς φίλους φυλάξαι, ἐὰν ὑπό γε τῶν βαρβάρων ἀδικῆσθε → It is irrational neither to begin battle nor to guard the friends, if you are ever wronged by the foreigners
German > Latin
unvorhergesehen, improvisus (s. »unvermutet« die Synon.). – incertus (ungewiß, z.B. incerti belli eventus). – Adv. improviso.