脆 has a very versatile range: 干脆 (gāncuì, simply/straightforward/decisive), 清脆 (qīngcuì, clear and crisp sound), 脆弱 (cuìruò, fragile). When describing food, 脆 always means a pleasant crunchiness.
⺼ is the meat-flesh radical, visually identical to 月 but tracing back to a slab-of-meat shape. It tags 脆 as a texture word for things that snap like cartilage or thin bone, alongside 肌 (muscle) and 脂 (fat).
危 supplies the reading, drifting from wēi to cuì but staying close in articulation. The faint flavor of precarious also fits: brittle things stand on the edge of breaking, the way a 危 cliff teeters.
