The system will complete the re-activation of your account within 24 hours after you submit the request.

re-activation 是由前缀 re-（表示"再次"）和名词 activation（激活）组成的复合名词。re- 表示"重新做某事"，activation 来自动词 activate（激活）。re-activation 合起来表示"重新激活"的过程或行为。