叛變 angolul

defect [defected, defecting, defects]▼(to abandon; to change one's loyalty)
verb
[UK: dɪ.ˈfekt] [US: ˈdiː.fekt]

defection [defections]▼(act or incidence of defecting)
noun
[UK: dɪ.ˈfek.ʃn̩] [US: də.ˈfek.ʃn̩]