(idiomatic) can't be undone, can't be saved, unable to recover

Alternative form of 取り返しがつかない

(informal, video games) to lag

A group of onmitsu, government-employed undercover agents, established by the 8th Tokugawa shogun, Tokugawa Yoshimune (1684–1751). Sometimes described as ninja.

the moon / (astronomy) a natural satellite

mound, hillock, tumulus (implies a manmade origin)

desk, table

desk; table

Zelkova tree, Zelkova serrata

do, perform, carry out