Ge-mǽran

According to the Old English Dictionary:

ge-mǽran

p. de; pp. ed [mára] To enlarge :-- He merce gemǽrde wiþ Myrgingum he enlarged his marches towards the Myrgings [or gemǽrde from gemǽran to determine?], Exon. 85 a; Th. 321, 6; Víd. 42. ge-mæran