ball & bol & bell & pel

ball
ball, bol
bell
pel, puls

ball
词根含义：to dance;
助记词：ballet，ball（跳舞）+et（名词后缀）=》芭蕾舞
同根词：ball, ballet, ballad, balletomane

ball, bol
词根含义：to throw;
助记词：ballot，ball（投掷）+lot（命运）=》投下去的东西能够决定别人的命运=》投票
同根词：ball, ballot, ballistic, balloon, parabola, metabolic

bell
词根含义：war;
助记词：rebel，re（反）+bel（战争）=》反向发动战争=》反抗，反判
同根词：belligerent, bellicose, antebellum, rebellion, rebel

pel, puls
词根含义：to drive, to push;
助记词：repel，re（一再）+pel（推）=》再一次把敌人推回去=》击退
同根词：compel, compulsion, dispel, expel, impel, propel, repel, repulse