Irreproachable

Ir`re*proach"a*ble (?), a. [Pref. ir- not + reproachable: cf. F. irréprochable.] Not reproachable; above reproach; not deserving reproach; blameless.

He [Berkely] erred, -- and who is free from error? -- but his intentions were irreproachable.
Beattie.