Un-ásecgendlíce

According to the Old English Dictionary:

un-ásecgendlíce

ad :-- Háligne Gást forþleórendne of Fæder and of Suna unásecgendlíce (inenarrabiliter), Bd. 4, 17; S. 586, 14. un-asecgendlice

Related words: Unspeakably, in a way that cannot be told, ineffably