Omen
Sign
noun, の adjective
ぜんちょう
前兆 (ぜんちょう) Omen, Sign
縁起 (えんぎ) Omen, Luck
吉 (きち) Good Omen
合図 (あいず) Signal, Sign
兆候 (ちょうこう) Sign, Indication
延長 (えんちょう) Prolonging, Extension
A zen ぜん Mrs. Chou ちょう is an Omen for calamity. The end is near.
It's an Omen that the word for Omen ぜんちょう sounds like chosen ちょうぜん backwards.