fictitious (adj.)

1610s, "artificial, counterfeit;" 1620s, "existing only in imagination," from Medieval Latin fictitius, a misspelling of Latin ficticius "artificial, counterfeit," from fictus "feigned, fictitious, false," past participle of fingere "to shape, form, devise, feign" (from PIE root *dheigh- "to form, build"). Related: Fictitiously; fictitiousness.