精打细算
jīng dǎ xì suàn · HSK 7
meticulous planning and careful accounting (idiom)
🧮 精(fine) + 打(work out) + 细(detailed) + 算(calculate) = work out every fine detail of the budget
Two calculation verbs (打算 means to plan/reckon) bracketed by 精 fine and 细 detailed, so the whole idiom reads as careful-reckon plus detailed-count: planning down to the last coin. 算 (calculate) shares its 竹 bamboo top with the old counting rods used on an abacus.
精 — rice 米 + blue/green 青 (phonetic)
A semantic-phonetic compound: 米 (rice) gives the meaning, while 青 supplies the sound. Originally referred to polished, refined rice — grain with the husk removed. The sense broadened to 'refined, pure, essence,' and later 'fine, skilled, spirit.'
打 — hand radical 扌 + nail 丁
打 combines the hand radical 扌 (action with the hand) with 丁 (originally a nail), suggesting striking or hitting with the hand. 丁 also serves as a phonetic hint in older readings. The meaning broadened from 'to strike' to a general verb for many hand-based actions, like 打电话 'make a phone call'.
细 — silk radical 糹 + 田 (field)
A semantic-phonetic compound. The silk radical 糹 supplies the meaning, since silk threads are fine and thin, giving 细 its sense of 'thin, fine, slender.' The right side 田 originally wrote 囟 (fontanel) as a phonetic hint, later simplified to 田 in modern script.
算 — bamboo 竹 + abacus 具 (eye 目 + two hands 廾)
Originally depicted counting with bamboo rods on an abacus-like device. The top 竹 (bamboo) refers to the bamboo counting sticks used in ancient Chinese arithmetic, while the bottom shows hands manipulating them. The meaning broadened from 'to count' to 'to calculate' or 'to plan'.