回应
huíyìng · HSK 6
respond
🔊 hui-YING = a reply echoing back, like sound returning to you
回 means return/go back, 应 means respond/answer. Together: a response that comes back — an echo or reply. The word carries both the acoustic sense (echo) and the conversational sense (respond to someone).
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.
应 — 广 (shelter) + 心 (heart) + 隹 (bird)
Originally written 應, this character combined a phonetic component with 心 (heart) to suggest 'responding from the heart' or 'answering a call'. The simplified form 应 keeps the top portion. Over time it broadened from 'respond/answer' to also mean 'should' or 'ought to'.