a. [ Pref. ir- not + reproachable: cf. F. irréprochable. ] Not reproachable; above reproach; not deserving reproach; blameless. [ 1913 Webster ]
He [ Berkely ] erred, -- and who is free from error? -- but his intentions were irreproachable. Beattie. [ 1913 Webster ]
n. The quality or state of being irreproachable; integrity; innocence. [ 1913 Webster ]