[ fawr-tis ]
/ ˈfɔr tɪs /


pronounced with considerable muscular tension and breath pressure, resulting in a strong fricative or explosive sound. In stressed position (p, t, k, ch, f, th, s, sh) and sometimes (h) are fortis in English as compared with (b, d, g, j, v, th̸, z, and zh), which are lenis.Compare lenis.

noun, plural for·tes [fawr-teez] /ˈfɔr tiz/.

a fortis consonant.

Origin of fortis

1905–10; < Latin: strong, powerful, firm Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

Examples from the Web for fortis

British Dictionary definitions for fortis

/ (ˈfɔːtɪs) phonetics /


(of a consonant) articulated with considerable muscular tension of the speech organs or with a great deal of breath pressure or plosion

noun plural -tes (-tiːz)

a consonant, such as English p or f, pronounced with considerable muscular force or breath pressure
Compare lenis

Word Origin for fortis

Latin: strong
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012