Ful-wyrcan

According to the Old English Dictionary:

full-wyrcan;

ful-wyrcan

p. -worhte; pp. -worht To do fully, accomplish, commit; perfĭcĕre :-- Gif hwá griþbryce fulwyrce if anyone commit a breach of the peace, L. C. S. 62; Th. i. 408, 22. ful-wyrcan