faultlessly

comparative more faultlessly · superlative most faultlessly

1. In a faultless manner.

   To the casual eye a mere smart and shining youth of less than thirty summers, faultlessly appointed in every particular, he yet stood among his progeny[…]

   1904, Henry James, The Golden Bowl

   2 more examples

   The interior of the "castle" was as faultlessly neat as its exterior was novel. The entire space, some twenty feet by forty, was subdivided into several small sleeping-rooms; the apartment into which he first entered, serving equally for the ordinary uses of its inmates, and for a kitchen.

   1841, J[ames] Fenimore Cooper, The Deerslayer: A Tale. […], 1st British edition, volume (please specify |volume=I, II, or III), London: Richard Bentley, […], →OCLC

   It is much easier to detect a fault than to produce a harmonious arrangement. And it is much easier for a man to see faults in a lady’s dress than to give directions for dressing faultlessly.

   1849, Timothy Shay Arthur, Advice to Young Ladies

   Synonyms: unfailingly, immaculately, impeccably