Under-ginnan

According to the Old English Dictionary:

under-ginnan

p. -gann; pl. -gunnon; pp. -gunnen To begin, attempt :-- Ic gedyrstlǽhte ðæt ic ðás gesetnysse undergann I ventured to attempt this work (the translation of a Latin work), Homl. Th. i. 2, 27. Gregorius ús trahtnode ðyses godspelles dígelnysse ðus undergynnende: 'Dryhten ús gewilnaþ ... etc.,' 608, 9. under-ginnan