vitiation

• viciation

Latin vitiare (“to spoil, damage”).

vitiation (countable and uncountable, plural vitiations)

1. a reduction in the value, or an impairment in the quality of something
   • 1936, Dale Carnegie, “Part 3, Chapter 1. YOU CAN"T WIN AN ARGUMENT”, in How to Win Friends and Influence People‎, page 137:

     Lincoln once reprimanded a young army officer for in-
     dulging in a violent controversy with an associate. "No
     man who is resolved to make the most of himself," said
     Lincoln, "can spare time for personal contention. Still less
     can he afford to take the consequences, including the vitia-
     tion of his temper and the loss of self-control. [...]

2. moral corruption
3. an abolition or abrogation