authentic
au-then-tic
adjective
True to one's own nature, spirit, or original character.
"She strives to live an authentic life."
adjective
Genuinely what it is claimed to be; not a copy or imitation.
"The museum displayed an authentic Roman coin."
Thesaurus
Synonyms: veritable, genuine, unquestionable, echt, bona fide, reliable, trusty, trustworthy