Formal:
* जिम्मेदार (jimmedar): This is the most common and general term for "responsible."
* उत्तरदायी (uttaradaayi): This literally translates to "answerable" and implies accountability.
Informal:
* ज़िम्मेदार (zimmedar): This is the informal pronunciation of "जिम्मेदार."
* ज़िम्मेवारी वाला (zimmevaari wala): This means "having responsibility."
In specific contexts:
* ज़िम्मेदार व्यक्ति (jimmedar vyakti): This means "responsible person."
* कार्य के लिए जिम्मेदार (kaary ke liye jimmedar): This means "responsible for the work."
The best choice will depend on the specific situation and the desired level of formality.