Un-genge

According to the Old English Dictionary:

un-genge

adj. Impracticable, useless, vain :-- Gé ungænge gedydon bebod Godes irritum fecistis mandatum Dei, Mt. Kmbl. Rush. 15, 6. [Icel. ú-gengr not fit to walk on. Cf. Ger. un-gangbar not current, impracticable.] un-genge