disintegrate

verb
1
to break into small parts or pieces and be destroyed
فروپاشیدن, تجزیه شدن, از هم پاشیدن, متلاشی شدن, خرد شدن
2
to become much less strong or united and be gradually destroyed
متلاشی شدن, از هم پاشیدن, فروپاشیدن
The authority of the central government was rapidly disintegrating.
synonym fall apart(2)