Betrian
Bosworth & Toller Anglo-Saxon Old English Dictionary - betrian
According to the Old English Dictionary:
betrigan;
- betrian
- p. ode; pp. od [bet well, betra better] To be better, to excel, to make better, to grow better; meliorari, emendare :-- Ic betrige melioror, Ælfc. Gr. 25; Som. 27, 13.