Volume
noun
In the body, liquids accumulate. It can be the body of a cup, a body of a bucket, or the body of your body. Whatever it is, this body accumulation represents the volume of liquid in your body.
たいせき
This is a jukugo word, which usually means on'yomi readings from the kanji. If you know the readings of your kanji you'll know how to read this as well.
父さんにガレージの体積を測るように言われたんだけど、理由は知らないよ。何か変だよね。
My dad told me to measure the volume of our garage, but I don’t know why. It seems kind of weird to me.