fortis

adjective
for·​tis | \ˈfȯr-təs \

Definition of fortis 

: produced with relatively great articulatory tenseness and strong expiration \t\ in toe is fortis, \d\ in doe is lenis

First Known Use of fortis

1897, in the meaning defined above

History and Etymology for fortis

New Latin, from Latin, strong

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The first known use of fortis was in 1897

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