交头接耳
jiāo toú jiē ěr · HSK 7
to whisper to one another's ear
👂🤫 交头接耳 = cross-heads + join-ears: heads lean in, ears connect to whisper
交 — top 亠 + 父-like crossed legs
Originally a pictograph of a person standing with legs crossed, showing the idea of crossing or intersecting. From this concrete image, the meaning extended to abstract senses like 'exchange,' 'interact,' and 'hand over.' Modern uses such as 交流 (exchange) and 交通 (traffic) all trace back to this core notion of crossing.
头 — 页 (head/page) + 豆 (bean, phonetic)
The traditional form 頭 combines 頁 (xié), meaning 'head', with 豆 (dòu) as the phonetic component. 頁 itself originally depicted a person with an emphasized head. The simplified form 头 is a modern shorthand that replaces 豆+頁 with a simpler shape while keeping the same meaning of 'head' or 'top'.
接 — hand 扌 + concubine 妾 (phonetic)
接 is a semantic-phonetic compound. The hand radical 扌 carries the meaning of receiving or joining with the hand, while 妾 supplies the sound. From 'taking with the hand' it broadened to 'receive, meet, connect, join together'.