Ful-trúwian

According to the Old English Dictionary:

ful-trúwian

p. ode; pp. od To trust fully in, confide in; pĕnĭtus confīdĕre :-- Ic nát, hwí gé fultrúwiaþ ðam hreósendan wélan I do not know, why ye confide in these perishable riches, Bt. 26, 2; Fox 94, 7. ful-truwian