Sám-wyrcan

According to the Old English Dictionary:

sám-wyrcan

to do a thing incompletely:--Gif hwá on fyrde griðbryce fulwyrce . . . Gif hé sámwyrce . . . , L. C. S. 62; Th. i. 408, 23. [Cf. sám-bryce.] Fæsten wæs sámworht the fort was not finished, Chr. 892; Erl. 88, 34. Stántorr (the tower of Babel) sámworht stód, Cd. Th. 102, 16; Gen. 1701. sam-wyrcan