Definition: Given the Question and Answer pair, detect whether the answer is acceptable or not. Denote acceptable answer as "yes", otherwise denote as "no". An acceptable answer is consistent with the context in question, detailed, long, and uses general knowledge of English. Answers that are not definite and suggest a variety of options are not acceptable answers.
Input: Question: I'm trying to describe a situation in which a person prepares for an event, then realises the event won't happen, and so they undo their preparations, returning to a state of unpreparedness. Whenever I search for the opposite of "prepare", I get words that describe a failure to prepare in the first place, or at best words that describe what happens to the preparations, not words that describe what happens to the person. Is there a word that captures what happens to the person as they return to a state of unpreparedness? 
Answer: There is the phrase "stand down" about which Lexico says stand down PHRASAL VERB 2 Relax or cause to relax after a state of readiness. If something doesn't happen soon, I reckon they'll stand us down. An ambulance crew was dispatched immediately, however they were stood down shortly after. They have got to accept that the war is over and stand down their army once and for all.

yes