UNLAWFUL Copy link • UNLAWFULinconcessus (poetical and Quint.): non concessus: vetitus: nefas (against the laws of God and man): non legitimus (☞ illegitimus to be avoided): iniquus: non justus. Unlawful means, artes malae: to be unlawful, non licere; illicitum esse. [On illicitus, Vid: ILLICIT.]