爆破
ばくは · bakuha · JLPT N1 · noun
explosion
爆 — fire 火 + 暴 (violent/sudden, phonetic)
A semantic-phonetic compound: 火 (fire) gives the meaning, while 暴 (sudden, violent) supplies the sound and reinforces the sense. Originally meant to burst or explode with fire, later extended to any sudden, forceful eruption like popping or bursting.
破 — stone 石 + skin/hide 皮
破 is a semantic-phonetic compound: 石 (stone) gives the meaning 'to break, smash,' since stones were used to crack things, while 皮 (pí) supplies the sound. The original sense of breaking stone broadened to mean 'broken,' 'damaged,' or 'to defeat.'