"秘密而匆忙地移居" can be translated into English as "to relocate secretly and hastily" or "to move away secretly and in a hurry".
Here are two example sentences to illustrate the usage:
1、 They decided to relocate secretly and hastily to avoid being caught by the authorities.
(他们决定秘密而匆忙地移居,以避免被当局抓获。)
2、 Due to the political unrest, many families chose to move away secretly and in a hurry.
(由于政治动荡,许多家庭选择秘密而匆忙地移居。)