背骨, 脊骨, 背ぼね

せぼね

noun (common) (futsuumeishi), nouns which may take the genitive case particle `no'

背	stature, height, back, behind, disobey, defy, go back on, rebel
骨	skeleton, bone, remains, frame
脊	stature, height

私の背骨の痛みはひどくなっています。

The pain in my back is getting worse.

椎間板ヘルニアは背骨の間にある椎間板という軟骨が飛び出すものです。

Disk herniation is when cartilage, called 'intervertebral disk' and found between each vertebra, slips out.

あ、そうだ。まゆに変なことしたら、背骨を折る。

One more thing. If you try anything on Mayu I'll break your spine.

Devenin belini kıran son saman çöpü.

The last straw breaks the camel's back.