- without fault or error
"faultless logic"
"speaks impeccable French"
"timing and technique were immaculate"
"an immaculate record"

1. 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.