汇聚
huì jù · HSK 7
to come together
🌊 汇 = converge/remit + 聚 = gather: two come-together words stacked, so they really come together
汇 carries the sense of waters flowing into one channel (and of remitting money); 聚 means to assemble or cluster. Doubling two synonyms for gathering yields convergence. The huì jù sound runs together just like the streams do.
汇 — water radical 氵 + 㠯 (older form)
汇 is the simplified form of 匯, originally depicting water (氵) flowing into a container (匚), meaning a place where streams converge. From this came the extended senses of gathering, collecting, and remitting funds. Modern uses like 汇款 (remit money) and 词汇 (vocabulary) all stem from this idea of things flowing together.
聚 — 取 (qǔ) phonetic + 乑 (yín, crowd of people)
聚 originally depicted a gathering of people, with 乑 showing three figures standing together to suggest a crowd. The component 取 (to take) provides the phonetic clue for the reading jù. Over time the meaning broadened from 'assembling people' to any kind of gathering, collecting, or amassing.