Webster’s Revised Unabridged Dictionary · 1913
Sinful
Sin′ful (sĭn′fụl), 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.