국권피탈이 · 국권피탈을
loss of national sovereignty; Japan's annexation of Korea (1910)
Example
1910년 국권피탈로 대한제국은 일본의 식민지가 되었어요.
With the loss of sovereignty in 1910, the Korean Empire became a Japanese colony.
Word parts
국 country+권 power+피 suffer+탈 seize
Literally 'national sovereignty being seized'.
Good to know
Textbooks now prefer 국권피탈 over 한일합병, which sounds like a voluntary merger.