Thread:JouXIII/@comment-35271227-20180727195729/@comment-26965846-20180828040049

X doesn't exist in the Japanese language so it doesn't mean anything. The closest pronunciation of it would be "Zachikyū" which also doesn't have a meaning. If you want kanji for it I suggest something like 座地灸 which roughly means "Gathering of the Earth's Chastisement."