KanjiJLPT N2
Long Time

long time, old story

Mnemonic

A person was snagged on a hook a Long Time ago. Seasons blur, years pile up, yet the hook holds firm. The person has stopped struggling entirely, moss creeping over their limbs—they've become part of the landscape, a monument to waiting.
Additional thoughts
Picture someone dangling from a giant fishhook, so still that vines and moss have grown over them. The absurd length of their predicament IS the long time. The kanji 久 even looks like a person with a hook pulling one leg back.
Quick recall
A person caught on a hook hangs there for such a Long Time that moss grows over them.

Details

The keyword for 久 is long time. This kanji conveys the idea of a prolonged duration or a lengthy passage of time. It suggests permanence, endurance, and the sense of something continuing far into the past or future. It is often used to express how much time has elapsed since an event or to describe something that has persisted over an extended period.
On'yomi
きゅう、く
Kun'yomi
ひさ.しい

Used in kanji