defection

名词 defection:

1. withdrawing support or help despite allegiance or responsibility
   同义词：desertion, abandonment
2. the state of having rejected your religious beliefs or your political party or a cause (often in favor of opposing beliefs or causes)
   同义词：apostasy, renunciation

1. Discontent in the party will lead to further defections.
   党内的不满情绪将导致更多的党员脱党。