previous ['privɪəs] 词频2 词根: vi

adj. 先前的;以前的;过早的;（时间上）稍前的; adv. 在先，在…以前;

💡 pre以前+vi路[引申为走]+ous...的→以前走过的→先的，前的

"I should like to echo the words of the previous speaker."

近义：introductory, onetime, back, precedent, preceding, prevenient 反义：hind, hindmost, back, postern, puisne, retral

employer [ɪm'plɔɪɚ] 词频2 词根: em

n. 雇主，老板;雇佣者;

💡 employ雇用 + er 表人 → 雇佣者

"No one wants to employ somebody who bad-mouths their former employer."

近义：headwoman, impresario, businessman, entrepreneur, boss 反义：hireling, jobholder, laborer, labourer, operative, operator

reason ['rizn] 词频1 词根: 思考

n. 理由;原因;理性;理智; vt.& vi. 推理，思考;争辩;辩论;向…解释;

💡 再（re）生一个（a）儿子(son)， 理由是第一个儿子夭折了

"The reason for the flood was that heavy rain."

近义：ratiocinate, think, conclude, deduce, deduct, motivation 反义：idiocy, applesauce, imbecility, inaccuracy, inanity, mistake

left [lɛft] 词频1

adj. 左边的，左侧的;左派的; n. 左，左面;[军]左翼;左派，激进分子; adv. 向左;在左边; v. 离开( leave的过去式和过去分词);

"He left school at the age of 18."

近义：nigh, leftover, pending, remaining, remanent, residual 反义：lacking, short