周密
zhoū mì · HSK 7
dense
🕸️🔬 周 all-around + 密 dense = coverage so close-packed it leaves no gap; thorough
周 means all-around or complete (as in 周到), and 密 means dense or tightly-spaced (as in 密集). Together: planning or attention packed tightly on every side, so nothing slips through. That is what makes it meticulous.
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.
密 — 宀 roof + 必 (phonetic) + 山 mountain
Originally referring to a hidden, sheltered place in the mountains, 密 combines 宀 (roof/cover) over 必 (phonetic) with 山 (mountain) at the base. The meaning extended from 'secluded mountain hideaway' to 'dense, close, secret'. Today it commonly means dense, intimate, or secret.