Example:He is a longtime proponent of fixed-point arithmetic.
Trick to remember: Opponent proponent hain.
Other meanings of Proponent
(noun) A person who advocates a theory, proposal, or course of action. /an individual who supports a cause. — विचार उपस्थित करनेवाला/प्रस्तावक Example: Because April loves animals, she is a fierce proponent of the animal rights movement.