KanjiJLPT N1
Confinement

confinement, to tie

Mnemonic

Molten gold is poured over the prisoner's shackles. As it hardens, it fuses every link into an unbreakable seal—total confinement. No file, no key, no flame can undo gold once hardened; the prisoner is locked away from public life forever, entombed in gleaming metal.
Additional thoughts
Picture golden manacles cooling and solidifying around wrists—gold that hardens equals permanent imprisonment. The luxury of the metal contrasts cruelly with the restriction it enforces.
Quick recall
Gold that hardens around your chains means eternal confinement.

Details

The keyword for 錮 is confinement. This kanji refers to the act of shutting someone in or imprisoning them, preventing their freedom of movement or activity. It carries the sense of being firmly locked away or sealed off, often used in historical contexts to describe political punishment where individuals were barred from holding office or participating in public life. The character conveys a strong sense of restriction and enforced isolation.
On'yomi
Kun'yomi
ふさ.ぐ