difficulty, misfortune
轗 centers on hardship and bad luck: difficulty and misfortune. The meanings are closely linked, both describing an adverse, unlucky state.
轗 combines 車 (vehicle) with 感, which likely contributes the sound. The exact historical development of the meaning 'difficulty, misfortune' is uncertain, but it may relate to a vehicle encountering rough terrain.
A vehicle (車) that feels (感) every bump on a rough road experiences difficulty and misfortune. Imagine an old cart struggling along a rocky path.
For カン, picture a can (カン) tied to the back of a bumpy cart, rattling with every misfortune: can -> カン.
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