Both Uses

resignation
in
Delirium, by Lauren Oliver
(Edited)

All the cows were lined up, packed in their stalls, staring at us mutely as we walked by, with that same look in their eyes, fear and resignation and something else.
p. 108.2 *

resignation = acceptance of something undesired as unavoidable
I hope Carol is listening, and takes this as a sign that I've resigned myself to the change in plans.
p. 415.8 *

resigned = quit

Definitions:

(1) (resignation as in: submitted her resignation)
to quit -- especially a job or position; or a document expressing such an act
(2) (resignation as in: accepted it with resignation)
acceptance of something undesired as unavoidable or the lesser of evils
(3) (meaning too rare to warrant focus)
To resign can also more specifically mean to surrender or give up as in "I was clearly going to lose the chess game, so I resigned;" or "She resigned all pretense."