碰撞
pèng zhuàng · HSK 7
to collide
💥 碰 (bump) + 撞 (strike) = bump + crash = two things colliding
碰 pèng means to bump or touch; 撞 zhuàng means to strike or knock into. Stack the two bump-words and you get a full-on collision. Note pèng falls then zhuàng falls — both fourth tone, two hard hits like the impact itself.
碰 — stone 石 + together 並
A semantic-phonetic compound: 石 (stone) gives the meaning of hard objects striking, while 並 (bìng, 'together/side by side') hints at the sound and the idea of two things meeting. Originally describing stones knocking together, it broadened to mean 'bump into,' 'collide,' or 'encounter by chance.'
撞 — hand radical 扌 + 童 (child/zhuàng phonetic)
A semantic-phonetic compound. The hand radical 扌 carries the meaning of striking or colliding, an action done with force. The component 童 supplies the sound, close to 'zhuàng'. Together they form a character meaning to bump into, strike, or crash against something.