fortition

noun2

1. •
   A sound change in which a consonant becomes more fortis.

   • Typically, stressed syllables trigger qualitative fortition and/or lengthening, whereas unstressed syllables are associated with lenition and/or shortening. — 2011
2. •
   (no longer used) Casual choice; fortuitous selection; hazard.

   • No rotation; no appointment by lot; no mode of election operating in the spirit of fortition or rotation, can be generally good in a government conversant in extensive objects. — 1790