Answer: topot

AnswerCrossword Clue
TOPOT

Goes ..: deteriorates

TOPOT

Go ... (deteriorate)

TOPOT

Go ... (spoil)

TOPOT
Go ..
TOPOT
Go .. (spoil)
TOPOTGo .. (deteriorate)
TOPOTGo ... (deteriorate).
TOPOTGo ....
TOPOTGo ...
TOPOTGo ....: become useless
TOPOTGoes ... (deteriorates)