de·mil·i·ta·rize also Brit de·mil·i·ta·rise 
/dɪˈmɪlətəˌraɪz/ verb
de·mil·i·ta·riz·es; de·mil·i·ta·rized; de·mil·i·ta·riz·ing /dɪˈmɪlətəˌraɪz/ verb [+ obj] : to remove weapons and military forces from (an area) — usually used as (be) demilitarized ▪ Analysts predict that the area will not be fully demilitarized this year. ▪ the demilitarized zone [=DMZ] between North and South Korea — opposite militarize
— de·mil·i·ta·ri·za·tion also Brit de·mil·i·ta·ri·sa·tion /dɪˌmɪlətərəˈzeɪʃən, Brit ˌdɪˌmɪlətəˌraɪˈzeɪʃən/ noun [noncount]
