existing but not yet developed or manifest; hidden or concealed

a substance that increases the rate of a chemical reaction without itself undergoing any permanent chemical change

उत्प्रेरक

English Usage: The addition of the enzyme acted as a catalyst for the reaction.

Hindi Usage: एंजाइम का जोड़ने से प्रतिक्रिया के लिए एक उत्प्रेरक के रूप में कार्य किया।