腰掛け台 こしかけだい bench (i.e. for bathroom); seat; small piece of furniture upon which one can sit on n Advanced ➥
腰抜かす こしぬかす to dislocate one's back v5s to be unable to stand up due to fear or surprise; to lose one's legs v5s Advanced ➥
腰を抜かす こしをぬかす to dislocate one's back exp v5s to be unable to stand up due to fear or surprise exp v5s Advanced ➥