Faultless

Fault"less, a. Without fault; not defective or imperfect; free from blemish; free from incorrectness, vice, or offense; perfect; as, a faultless poem.

Whoever thinks a faultless piece to see,
Thinks what ne'er was, nor is, nor e'er shall be.
Pope.

Syn. -- Blameless; spotless; perfect. See Blameless.

-- Fault"less*ly, adv.- Fault"less*ness, n.