bargain something away
phrasal verb with bargain verb [ I or T ] uk/ˈbɑː.ɡɪn/ us/ˈbɑːr.ɡɪn/
以高价值物品交换低价值物品
to exchange something good for something of less value
I realized that by trying to gain security I had bargained away my freedom. 我意识到，为了获得安全保障我轻易地牺牲了自由。