faultless
US /ˈfɑːlt.ləs/
UK /ˈfɑːlt.ləs/

1.
impecável, perfeito, sem falhas
without fault or defect; perfect
:
•
Her performance was absolutely faultless.
A performance dela foi absolutamente impecável.
•
The craftsmanship of the antique vase was faultless.
O artesanato do vaso antigo era impecável.