Sentence:  Instead, at some stage, the older man is ritually <WSD>deranked</WSD> from his working group by retirement. Peer pressure <WSD>deranks</WSD> him in many other activities from sport to sex. Within the family, he will also <WSD>derank</WSD> at some stage to the role of consultant in family affairs, especially in those matters in which he has experience. 
Meaning of the word marked with <WSD> tags:  To lower the status or importance of