Ficol

According to the Old English Dictionary:

ficol

Substitute: Crafty, deceitful, false:--Ficol versipellis, Kent. Gl. 493. Ne beón gé náðor ne tó swicole ne tó ficole ne leáse ne lyðerfulle, Wlfst. 40, 4. Sume weorðað swicole and swǽslíce ficole and bútan getrýwðum forscyldgode on synnan, 82, 3. [N. E. D. fickle.] v. fic. ficol