adjective /ˌbəʊ.nəˈfaɪ.di,ˌboʊnəˈfaɪdi,ˈboʊnə.faɪd,ˈboʊnəˌfiːdeɪ/
Although he failed, the prime minister made a bona fide attempt to repair the nations damaged economy.
b) Genuine; not counterfeit.
This is a bona fide Roman coin.
Wikipedia foundation.