boar, male pig
豭 centers on a male pig, specifically a boar. The meanings are straightforward and refer to the same animal.
豭 combines 豕 (pig) with 叚, which likely contributes the sound. The character specifically denotes a male pig or boar.
The left side 豕 is a pig, and the right side 叚 looks like a sturdy, bristly shape. Picture a tough male boar with bristles standing beside the pig character.
For カ, imagine a boar crashing through a car: car -> カ, and the boar's tusks dent the hood.