KanjiJLPT N1
Leisure

spare time, rest, leisure, time, leave of absence

Mnemonic

The sun hangs lazily overhead. You twist your key, lock the final box of paperwork, and walk out once more into pure leisure. Sun on your skin, key tossed aside, box forgotten—once more, you're truly free.
Additional thoughts
Visualize a bright afternoon: you ceremonially lock all your obligations into a box, pocket the key, and step into the sunlight once more. The sun represents perfect leisure weather beckoning you outside.
Quick recall
Sun overhead, twist the key, lock the box, step out once more into leisure.

Details

The keyword for 暇 is leisure. This kanji refers to free time, spare time, or a period when one has no particular duties or work to attend to. It conveys the idea of having an opening in one's schedule, a break from busyness, or being at ease without obligations. It can also carry the nuance of taking leave or having a lull, and in some contexts it may even imply idleness or having nothing to do.
On'yomi
Kun'yomi
ひま、いとま