资料来源 : Webster's Revised Unabridged Dictionary (1913)

Spotless \Spot"less\, a.
   Without a spot; especially, free from reproach or impurity;
   pure; untainted; innocent; as, a spotless mind; spotless
   behavior.

         A spotless virgin, and a faultless wife. --Waller.

   Syn: Blameless; unspotted; unblemished; pure; immaculate;
        irreproachable. See {Blameless}. -- {Spot"less*ly}, adv.
        -- {Spot"less*ness}, n.

资料来源 : WordNet®

spotlessly
     adv : in a spotless manner; "spotlessly clean"