noun
kalpa; eon; aeon
Only with reading こう / ごう
Buddhist term for an immensely long cosmic period. Often used in phrases like 劫を経る (to pass through kalpas).
仏教では、一劫は想像を絶する長さの時間とされる。
In Buddhism, one kalpa is considered an unimaginably long span of time.
noun
ko; eternal capture position
In Go, a position where a stone can be captured and immediately recaptured, leading to a cycle. Usually written in katakana as コウ.
コウが発生したので、すぐに取り返すことはできない。
A ko has arisen, so you cannot immediately recapture.
Katakana spelling is usual for the Go term.
From Middle Chinese 劫 (kɨɐp̚), a transcription of Sanskrit कल्प (kalpa). The Go sense derives from the Buddhist concept of an endless cycle.