circumference
circum-(around, about) + ferre(carry, bear)
lead around, take around, carry around: 引きずり回す、連れ回す、持って回る
bearが興味深い
PIE rootの*bher-はcarryの他にto bear children: 子供を出産する
carryとはoutside boundary of a surface(表面の境界の外側へ)ということ
→periphery(周囲、外周、周辺部)も関連
https://gyazo.com/62d6ff4b85fb4d20d49edfd1b084b048
source: By Circle-1.png: en:User:DrBob, en:User:Frencheigh, en:User:GuanacoCIRCLE_1.svg: en:User:Optimagerderivative work: Jokes_Free4Me - This file was derived from: CIRCLE 1.svg:, CC BY-SA 3.0
発音に注意
circumstanceはcirにアクセントがあるが、circumferenceはcumにアクセントがある
https://www.youtube.com/watch?v=r5pcZDoMp1M
noun
the enclosing boundary of a curved geometric figure, especially a circle.: 曲がった幾何図形の囲っている境界線、特に円
(円･楕円（だえん）などの)周囲, 周辺, 円周; 範囲 #mathematics
the distance around something: 何かの囲む距離
e.g. babies who have small head circumferences: 頭囲の小さい赤ん坊
e.g. two inches in circumference.: 周囲が二インチ
DERIVATIVES
circumferential | sərˌkəmfəˈren(t)SH(ə)l | adjective
circumferentially adverb
ORIGIN
late Middle English: from Old French circonference, from Latin circumferentia, from circum ‘around, about’ + ferre ‘carry, bear’.