Seeing Latin "nex" as root in pernicious, I looked to see if there were other words using
that root. For instance, why not "nexious"? I found a few sites that used it, but mostly
as "handlle" in some spooky dragon sites. Then I found it in translation of a Spanish
health site:
"
Palabras clave: CARCINÓGENOS AMBIENTALES; PROMOTORES DE TUMOR; ONCÓGENOS;
VIGILANCIA INMUNOLÓGICA; SUSTANCIAS NOCIVAS.

SUMMARY

In this work we briefly show some environmental factors that may become cancerigenic in humans; among
them we can find alcohol addiction, smoking; and some especific food as well as certain in-dustrial toxics
and stress as a psychologic mechanism. These factors may modify the efficient health promotion, intended
to prevent such a terrible disease.

Key words: ENVIRONMENTAL CARCINOGENS; TUMOR-CAUSING AGENTS; ONCOGENOUS;
INMUNOLOGIC SUVEILLANCE; NEXIOUS SUBSTANCES.

But since "noxious" is from same root, I guess we don't really need "nexious". Incidentally, my
dictionary give "death" as translation of "nex".

For the hell of it, I checked to see if "pornicious" has been used and found two sites
using it. I have encountered a couple more innocent sounding sites that turned out
to be "pornicious".

>two sites using it

one of which uses it like this: "It is particularly targeted at children the most volnerable segment of our society who have groatly suffered two pornicious effocts of the societul decay of the past de›ades of milltary rule."

lots of good words there!

Pornicious anemia = a blood disorder common to performers in adult movies and other workers in the sex industry.