threat, long ages
劫 centers on a forceful, threatening action that unfolds over a long, drawn-out period: a threat that persists through long ages.
劫 combines 去 (to go away, past) with 力 (strength, force), suggesting a forceful removal or a threat that persists over time. The exact historical development is uncertain.
The left side 去 means 'to go away' and the right side 力 means 'strength'. Imagine a threat so strong it forces you away, and this threat lasts for long ages.
For コウ, imagine a long, drawn-out threat that makes you cough (コウ) from the stress. The coughing threat lasts for ages.
kalpa (eon, aeon)
troublesome; bothersome; tiresome; annoying
forevermore; for eternity
eternity; perpetuity
superko; special ko rule that handles reoccurring board positions like triple ko, eternal life etc.
eternity
eternity; through all eternity; for evermore; for many generations to come
the kalpa of existence (the second aeon of the universe)
to show unwillingness (to do); to be reluctant (to do); to look annoyed; to show signs of finding something bothersome
pillage; plunder
world-destroying conflagration
robbery; robber
ko threat
eternal punishment
long time; long years of service
to become skilled through years of experience
the four kalpa (formation, existence, destruction, nothingness)
Jinkōki (1627 Japanese mathematics text by Yoshida Kōyū)
incomprehensibly long time; infinity
the kalpa of destruction (the third aeon of the universe)