Waist
Lower Back
noun
The kanji and the word are exactly the same. That means they share meanings as well.
腰 refers to the waist area around the top part of the hip bone — the part that sticks out when you put your hands on your hips. It includes the sides and the back as well, which is why this can also mean lower back.
The reading is the same as what you learned with the kanji.
あのバッターは腰が強い。
That batter has a strong waist.
腰に力を入れて立ってください。
Please put strength in your waist when standing.
腰に激痛が走ってるんだ。もう一歩も歩けないよ。
My waist is in intense pain. I can’t take another step.