回忆
huíyì · HSK 5
to recall; memories
💭 回 = return + 忆 = remember; returning to a memory
回 means return or go back, and 忆 means remember or think of. Together they mean recalling — the mind returning to something past. The 忄 radical on 忆 marks it as heart/mind related.
回 — enclosure 囗 + smaller 囗 inside
回 is a pictograph of a swirling whirlpool or coiled spiral, shown as nested squares in modern form. The original meaning was 'to revolve' or 'turn around,' which extended to 'return' and 'a time/occurrence.' It also appears as a phonetic in characters like 茴 and 廻.