周到
zhoū dào · HSK 7
thorough
🎁 周 all-around + 到 arrive = attention that reaches all around = thoughtful, thorough
周 — enclosure 囗 + 吉 (earth 土 + mouth 口)
Originally a pictograph of a field with grain plotted in rows, suggesting density and completeness. It came to mean 'all around,' 'circumference,' and 'complete,' later extending to 'week' (a full cycle). Also a major surname, famously the Zhou dynasty.
到 — 刂 knife + 至 (phonetic, 'arrive')
到 is a semantic-phonetic compound. 至 ('to arrive') gives both meaning and sound, while 刂 (knife) was added later, likely as a phonetic reinforcer or to distinguish the written form. The core sense 'to arrive, reach' comes directly from 至, and 到 has carried that meaning since early script forms.