快 快 kuài Strokes7 Radical 忄 — heart Made of 忄 heart 夬 decisive, certain How it's builtIdeograph — the meaning is built from its parts Play the animation
递 递 dì Strokes10 Radical 辶 — to walk Made of 辶 to walk 弟 young brother, junior How it's builtPhono-semantic — one part hints at the meaning, another at the sound Play the animation