1) Blameless 2) Clean-handed 3) Free from blame 4) Free of guilt 5) French word used in English 6) Guiltless 7) Inculpable 8) Innocent 9) Not reproachable 10) Not subject to blame 11) Unimpeachable Found on https://www.crosswordclues.com/clue/irreproachable
Ir`re·proach'a·ble adjective [ Prefix ir- not + reproachable : confer French irréprochable .] Not reproachable; above reproach; not deserving reproach; blameless. « He [ Berkely] erred, -- and who is free from error? -- but his intentions were irreproachable .... Found on http://www.encyclo.co.uk/webster/I/98