ἀπρομήθης

ες
A. not known beforehand, τὸ ἀ. τῶν γεγονότων J. AJ 19.3.1; τὸ ἀ. failure to take previous accountin time, ib.18.6.5.
Liddell, Scott & Jones
A Greek-English Lexicon, 1940
An open-access project