Swic-full

According to the Old English Dictionary:

swic-full

adj. Deceitful, fraudulent, crafty :-- Swicfulles strophosae, callidae. Hpt. Gl. 423, 61. Swicfullum fraudulento, 517, 45. Swicfulle frivola, fraudulenta, falsa, 444, 26. Swicfullum fraudulentis, 521, 31. swic-full