Chinese hell is
1) a place on earth 土 with
2) two headed snakes 也
3) and dogs 狗
4) which talk 言
5) and are vicious 犬
And worst of all you have no phonetic clue as to how to pronounce ANYTHING you read there!
Inter = (Earthly, physical, and/or material) Place
Underground! = Jail
(associative idea character, no phonetic component)
(Hell, in China, is a Place of Imprisonment on earth…)
Both are di4 and yu4 are 4th tone.