frying, explosion
炸 centers on a sudden, violent release of energy: an explosion or the rapid, intense cooking of frying. Both senses share the idea of something bursting or crackling under heat.
炸 combines 火 (fire) with 乍, which likely contributes the sound and suggests a sudden action. The modern form visually pairs fire with a component associated with abruptness, fitting the meanings of explosion and frying.
Fire 火 on the left and the abrupt-looking 乍 on the right: imagine a pan of oil suddenly exploding into a furious fry when the fire hits it.
For タク, picture a tack being thrown into a hot pan, causing a tiny explosion of oil: tack -> タク, and the fire makes it burst.
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