withstand, endure, support, resist
堪 centers on holding firm under pressure: withstanding hardship, enduring pain, supporting a burden, or resisting an urge. The meanings all share the idea of bearing up without breaking.
堪 combines 土 (earth) with 甚, which likely contributes the sound and the idea of extreme or excessive. The compound suggests the earth's capacity to bear weight, extended to enduring or withstanding.
The left side is earth 土, and the right side 甚 suggests something extreme. Picture the earth supporting a massive, extreme weight without crumbling: it withstands, endures, and resists.
For カン, imagine a can of food enduring a heavy load on top of it: can -> カン, and the can withstands the pressure just like 堪.
intolerable; unbearable; unendurable
proficient; skilled; skillful; good; accomplished
to bear; to stand; to endure; to put up with
to bear; to endure
one's store of patience
patience; forbearance; endurance; tolerance
to endure what is unendurable is true endurance
incompetence
to be fit for work
to be equal to the task; to be up to the job; to be capable of filling the post
unable to suppress one's emotions
really good; irresistible
to be unable to endure; to be unable to stand (something); to lose patience
intolerable; unbearable; unendurable
intolerable; unbearable; unendurable
intolerable; unbearable; unendurable
intolerable; unbearable; unendurable
like hell I'll ...; I'm not about to ...
intolerable; unbearable; unendurable
to be unable to bear (something) any longer; to be unable to put up with