In The World, On Earth
Adverb
いったい
一体どうなっているんだ。
What the heck is going on?
「あいとにくしみはひょうり一体」って、一体全体どういういみなんだ！？
What the heck does, "There's a thin line between love and hate," mean?
一体俺が何をしたって言うんだよ？
What the heck did you say I did?
Okay, so this one is really weird, sorry. Each of us only get one body in our lifetimes, right? Well what the heck! What if I want more than one body. Let's all be mad about this together.
This is a jukugo word that uses the on'yomi readings of the kanji. You should be able to read this on your own. Just watch out because いち is shortened to いっ here!