From be- + hallow.
behallow (third-person singular simple present behallows, present participle behallowing, simple past and past participle behallowed)
- (transitive) To make holy; consecrate; sanctify; hallow completely.
1835, William Henry C. Grey, The Lords and the people:
- [...] bishops and servants of God — the "senatores natu majores," the elders and chiefs of the people — caused his eldest son, Egfurth, to be behallowed (which is the Saxon term used for the consecration of a bishop) as king of Mercia.
- 1842, The Church of England quarterly review:
- Kings are "behallowed" as well as bishops; [...]