暇
ひま · hima · JLPT N5 · noun
spare time
🛋️ 暇 = 日 (day) + 叚 (borrow): a borrowed day is free time
The left part 日 means day or sun. The right part 叚 carries the sense of borrowing, as in 仮 (temporary). A day on loan from your duties is leisure. Sound hook: hima is what a HE-MAn has between battles — nothing to do.