1.
eternity; permanence; everlastingness
An immeasurably long span of time, or something that lasts forever. Originally a Buddhist term referring to the infinite past or future, now used more broadly in literary and formal contexts.
Composed of 久 (long time) and 遠 (distant). Originally a Buddhist term (久遠実成 refers to the Buddha's eternal existence), it has expanded into literary and formal Japanese.