경질이 · 경질을
replacement (of an official), sacking
Example
대통령은 문제가 된 장관을 경질했습니다.
The president replaced the minister who had caused the problem.
Word parts
경 change+질 alternate
Literally 'change and alternate'.
Good to know
A homonym 경질 means 'hardness'; in politics it always means replacing an official.