遇上
yùshàng · HSK 7
to come across (sb); to run into
🤝 遇 meet + 上 onto = to run into someone or something
遇上 stacks 遇 (to meet) with 上 (up/onto), giving the sense of bumping right into an event or person. The 上 adds the nuance of something landing on you, so it often marks an unexpected encounter.
遇 — 辶 (walk radical) + 禺 (phonetic, monkey)
遇 is a phono-semantic compound. The walking radical 辶 supplies the meaning of going or moving along a road, while 禺 (an old word depicting a monkey-like creature) provides the sound. Together they evoke encountering someone while traveling, giving the modern senses 'meet,' 'come across,' or 'treat.'
上 — horizontal line above a baseline
上 is an indicative character (指事): a short stroke placed above a longer reference line shows the concept of 'above' or 'up'. The earliest oracle-bone forms used two horizontal lines for this; the modern shape added a vertical stroke for clarity. The core meaning of 'upper, above, to ascend' has stayed stable for millennia.