• 年を取ると足腰が弱くなる
    • As we get older, our legs [leg muscles] weaken.
    • 足腰が立たなくなる
    • become unable to stand
    • 足腰が立つうちは働きたい
    • I want to work as long as I'm able (to get around).
    • 足腰が立たなくなるほど痛めつける
    • beat a person until he can no longer stand