This is the 5687th most frequent Chinese word.
即位
"即位" means "ascend the throne" or "assume a position of sovereignty."
Here, '即位' directly means to assume the throne, specifically in the context of formal accession to power.
皇帝在仪式上正式即位。
The emperor officially ascended the throne during the ceremony.
'即位' is figuratively used to refer to the initiation of leadership in a new position, beyond monarchies.
新总统即位标志着新时代的开始。
The inauguration of the new president marked the beginning of a new era.
Although more casually applied here, '即位' retains the sense of formal acceptance of an authoritative role or position.