Meaning of unimpeachable in Hindi is : बेदाग़/अनिन्द्य
Definition of word unimpeachable
not able to be impeached or reproached (adjective)
beyond doubt (adjective)
Examples of word unimpeachable
Quality: High (Jeff Smith's art and storytelling remain unimpeachable, and Hamaker's color has reached new levels of awesomeness)
For diabetes sufferers, the 'menu du jour' will include half a bottle of red vin ordinaire, following what Lansley will call "unimpeachable" research proving that such treatment contributes to their care.
The _morale_ of the players could hardly be called unimpeachable, at least in some instances, but the violations of social rules were not so open as they had been in the old days.
"It's given opponents of climate action leverage to attack what was widely considered to be unimpeachable, which is the science."
By the way, the word you want is 'unimpeachable', not 'impeachable'.