मुझे नहीं मालूम
Definition in English: used to express something that you are not aware of or do not understand
Definition in Hindi: किसी चीज़ के बारे में न पता हो या न समझ हो तो प्रयोग किया जाता है
Example: My wife asked me if I knew where the bag was and I said in Hindi ‘Mujhe nahin maloom‘.