hoe
钁 centers on a hoe, a farming tool used for digging and tilling soil.
钁 combines 金 (metal) with 矍, which likely contributes the sound. The character is associated with a metal hoe or digging tool.
The left side 金 (metal) suggests a metal tool, and the right side 矍 looks like a complex digging implement. Picture a sturdy metal hoe with a heavy blade.
For カク, imagine a farmer using a hoe to dig a square plot: the sharp 'kak' sound of the blade hitting the soil cues カク.
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