Various Joints, Every Joint, Various Parts
noun
Your joint joints are your various joints, or even every joint in your body, or a specific body part. When we're not talking about the joints in your body, this means something like various parts, referring to various parts of a whole.
ふしぶし
This is just the kun'yomi of 節, which you learned with 節目, repeated twice. Keep in mind that the second ふし gets rendaku'd to ぶし!
なんか体の節々がズキズキする。
Every joint in my body is throbbing somehow.
あの人、言葉の節々にトゲがあるよね。
That person makes some harsh word choices, huh?
早織は節々の痛みを感じて目を覚ました。
Saori woke up with pains in various joints.