The quality of being incapable of making mistakes or being wrong.

गलती ना करने की गुणवत्ता

English Usage: The infallibleness of his methods made him a revered figure in the scientific community.

Hindi Usage: उसकी विधियों की infallibleness उसे वैज्ञानिक समुदाय में एक आदर्श पात्र बना देती है।