Sin"ful (?), a. [AAS. synfull.]
Tainted with, or full of, sin; wicked; iniquitous; criminal; unholy; as, sinful men; sinful thoughts.
Piers Plowman.
Ah sinful nation, a people laden with iniquity.
Isa. i. 4.
-- Sin"ful*ly, adv. -- Sin"ful*ness, n.
© Webster 1913.