xǐ
(literary) to change one's residence
迁徙
qiān xǐ
to migrate
曲突徙薪
qū tū xǐ xīn
lit. to bend the chimney and remove the firewood (to prevent fire) (idiom)
民族大迁徙
mín zú dà qiān xǐ
great migration of peoples
转徙
zhuǎn xǐ