碰到
pèngdào · HSK 2
come across
👋 碰 (bump) + 到 (arrive) = bump into / arrive at someone
碰 means to bump or collide; 到 means to reach or arrive. Together 碰到 literally is bump-and-reach, the act of bumping into something or someone unexpectedly — i.e. to encounter or run into.
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.'
到 — 刂 knife + 至 (phonetic, 'arrive')
到 is a semantic-phonetic compound. 至 ('to arrive') gives both meaning and sound, while 刂 (knife) was added later, likely as a phonetic reinforcer or to distinguish the written form. The core sense 'to arrive, reach' comes directly from 至, and 到 has carried that meaning since early script forms.