spare time, rest, leisure, time, leave of absence
暇 centers on unoccupied time: having a break from work or duties, free time for leisure, or a formal leave of absence.
暇 combines 日 (sun/day) with 叚, which likely contributes the sound and the idea of a gap or interval, suggesting a gap in the day for rest or leisure.
The sun 日 on the left and the right side 叚 (which looks like a gap or interval) together suggest a sunny gap in your schedule: free time to rest.
For カ, imagine a car (カ) parked in the sun during a long, leisurely break: car -> カ, and the sunny gap gives you spare time.
spare time; free time; leisure
holiday; vacation; day off; time off; leave; furlough
killing time; keeping oneself occupied; time killer
person with a lot of free time on their hands; person of leisure; idler; loafer
leisure; leisure time; spare time
taking leave (of a visited place); leaving; going home
free time; spare time; leisure
if you are free; if you have time to spare; if not otherwise engaged
Christmas holiday; Christmas vacation
paternity leave
vacation to recharge one's batteries; vacation given in reward for long service; special incentive leave
shore leave
holiday plans
leave-taking tactics; many employees taking paid leave at the same time as a form of industrial action
holiday trip; vacation trip
post-vacation
national park resort village; holiday village
National Park Resort Villages
strike for leave
application for leave