proponent/pɹəˈpəʊnənt/EtymologyFrom Latin prōpōnēns, present participle of prōpōnō (“to put forward; propose”).proponent means making proposals; proposing. Lexicurio rates it Rare gem — a strength score of 76 out of 100.adjMaking proposals; proposing.nounOne who supports something; an advocate.“Proponents of the race — notably Mayor Michael R. Bloomberg and Mary Wittenberg, director of the marathon — said the event would provide a needed morale boost, as well as an economic one.”One who makes a proposal or proposition.One who propounds a will for probate.