An act that is immoral or bad; a breach of rules or laws.

गलत कार्य

English Usage: The politician was charged with a serious wrongdoing that shook the public's trust.

Hindi Usage: राजनीतिज्ञ पर एक गंभीर गलत कार्य का आरोप लगाया गया जिसने जनवासियों का भरोसा हिलाकर रख दिया।