unsoldier
/ˌənsɒlˈdɪər, ˌʌnsɔlˈdɪər/Definitions
1. noun
A person who is no longer a soldier, often as a result of being discharged from military service.
“After being honorably discharged, the unsoldier struggled to adjust to civilian life.”
2. verb
To remove someone from their military status, often as a result of discharge or retirement.
“The veteran was unsoldiered after serving for over 20 years.”