zuru verb, intransitive verb
Honorific or respectful term for the death of an emperor or high-ranking person; rare and formal, mostly found in historical or literary contexts.
先帝が崩じられたのは、今から百年も前のことだ。
It was a hundred years ago that the previous emperor passed away.
More common ichidan verb with the same meaning; 崩ずる is a rare zuru-verb alternative.
The zuru-verb form 崩ずる is an older alternative to 崩じる, derived from classical Japanese verb morphology. The exact historical derivation is uncertain.