分散
ぶんさん · bunsan · JLPT N1 · noun
dispersion
💥 分 (divide) + 散 (scatter): things split apart and spread out, like a burst of confetti
Dispersion, decentralization and statistical variance all describe values or parts spreading away from a centre. 分 means divide and 散 means scatter.
分 — knife 刀 + eight 八 (split apart)
分 originally depicted a knife (刀) cutting something into two parts, shown by 八 above (which itself meant 'divide'). The core sense is 'to divide' or 'split', from which extended meanings like 'portion', 'minute', and 'part' developed. Pronounced fèn, it carries the sense of an allotted share.
散 — 月 (meat) + 攵 (action) + 卄 (hemp fibers)
Originally depicted beating hemp fibers apart with a stick, with 月 (meat/flesh) added later. The core image of separating or scattering things gave rise to meanings like 'scatter,' 'disperse,' and 'loose/leisurely.' The 攵 component signals an action done by hand.