expression, ichidan verb
stand up; get up from sitting
Literal physical action of rising from a seated position. Often used when someone has been sitting for a while and finally stands.
See also: 腰を下ろす
長い会議の後、ようやく腰を上げた。
After the long meeting, I finally stood up.
expression, ichidan verb
get moving; take action; get off one's backside
Idiomatic: to finally start doing something after hesitation or delay. Often implies overcoming inertia or laziness.
そろそろ重い腰を上げて、仕事を探さないと。
I need to get off my backside and start looking for a job soon.
政府がようやく腰を上げて対策を始めた。
The government finally took action and started countermeasures.