Question

what is the meaning of the foreign expression in bold? do you know how to tell whether your money is counterfeit? bona fide u.s. currency has fine blue and red fibers embedded in the paper. counterfeit money, on the other hand, imitates that look with blue and red lines printed on the surface of the paper. accurate or correct authentic or genuine better or improved unique or original

Explanation:

The context contrasts "Bona fide" currency with counterfeit money. Counterfeit is fake, so "Bona fide" must mean the opposite - real or genuine.

Answer:

authentic or genuine