From Wiktionary, the free dictionary
From cashier + -ment.
cashierment (usually uncountable, plural cashierments)
- (obsolete) dismissal
1872, Mayne Reid, Osceola the Seminole, Or The Red Fawn of the Flower Land, page 243:My friend's consolatory speech failed to cheer me; and, in no very joyous mood, I walked towards the quarters of the captive, to add still further to my chances of “cashierment.”