irreproachable

First attested in 1630. Borrowed from French irréprochable, from Middle French inreprochable. See also ir- +‎ reproachable.

irreproachable (not comparable)

1. Free from blame, not open to reproach or criticism; blameless.

• See Thesaurus:flawless

• “irreproachable”, in The American Heritage Dictionary of the English Language, 4th edition, Boston, Mass.: Houghton Mifflin, 2000, →ISBN.
• William Dwight Whitney, Benjamin E[li] Smith, editors (1911), “irreproachable”, in The Century Dictionary […], New York, N.Y.: The Century Co., →OCLC.
• “irreproachable”, in Dictionary.com Unabridged, Dictionary.com, LLC, 1995–present.
• “irreproachable”, in Webster’s Revised Unabridged Dictionary, Springfield, Mass.: G. & C. Merriam, 1913, →OCLC.