for·tis I. \ˈfȯr]d.ə̇s, ˈfȯ(ə)], ]tə̇s\adjective Etymology: New Latin, from Latin, strong — more at fort of one of two homorganic consonants: produced with greater articulatory tenseness and stronger expiration < \t\ in toe is fortis, \d\ in doe is lenis > II. noun (pluralfortes \]d.(ˌ)ēz, ]ˌtēz\) Etymology: New Latin, from fortis, adjective : a fortis consonant