also: えんき
noun
anniversary of a death twelve or more years earlier
Buddhist term for a memorial service held on a death anniversary that is twelve or more years after the person's passing. Often used in the context of 年忌 (nenki) memorial observances.
See also: 年忌
遠忌の法要を営む。
Hold a memorial service for a distant death anniversary.
祖父の五十回忌の遠忌に親族が集まった。
Relatives gathered for the 50th memorial anniversary of my grandfather.
年忌 refers to death anniversaries in general, while 遠忌 specifically refers to those twelve or more years after death.
From 遠 (distant) + 忌 (mourning, anniversary of death). The reading おんき is the more common on'yomi combination.