ball (1)
"round object," O.E., from O.N. bollr "ball," from P.Gmc. *balluz (cf. O.H.G. ballo, Ger. Ball), from PIE base *bhel- (2) "to swell" (see bole). The verb meaning "copulate" is first recorded 1940s in jazz slang. To be on the ball is 1912, from sports. Ball-point pen first recorded 1946. Ball of fire when first recorded in 1821 referred to "a glass of brandy;" as "spectacularly successful striver" it is c.1900. Ball and chain as a prisoner's restraint is recorded from 1835; as "one's wife," early 1920s.
此ball 与balloon (气球，球状物)，ballot (选票;投票)，bull (教皇诏书;股市看涨的人)，bale (大包) 等同源。
而hyperbole里对于的ball是：
◆ ball, bol, blem 扔，投，刺
印欧词根形式为gwel-。
ball(ball投 → 投足 → 投也表示“跳”，如投江 → 腿脚在跳动，举手投足 → 跳舞 →)
n.(盛大、正式的)舞会
ballet(ball舞会 → 舞，-et指小。小舞 → 女演员常用脚趾尖点地的小步舞 →)
n. 1. 芭蕾舞，芭蕾舞剧;2. 芭蕾舞团
problem(pro- 前，-blem投。投在前面 → 在前面路上 → 会成阻碍 →)
n. 1. 问题，疑难问题;2. 思考题，讨论题
symbol(sym-一起，bol投;投在一起→放在一起可以对照、比较→用来对照、比较的一套东西→)
n. 1. 符号，标志;2. 象征
当然还有一些同源词。
而线词源字典对hyper-的解释也很清楚：
hyper-
from Gk. hyper (prep. and adv.) "over, beyond, overmuch, above measure" (see super-)
hyper- 来自希腊语huper或，对应的是super-
基本意思是：over
那么，hyperbole到底该怎样解释呢?
hyperbole (hyper- 超出，过度;bol投;-e后缀;投的超出某个界限 → 描述某件事超出了界限范围 →)
n. 夸张(法)
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