pollution [pə'luʃən] 词根: 灰尘

n. 污染（作用）;腐败;堕落;沾污;

💡 pollut污染 + ion 表示行为、行为的过程或结果、情况、状态 → n.污染

"Thousands of young salmon and trout have been killed by the pollution."

近义：contamination, profanation, defilement, desecration 反义：purging, purifying, refining, straining, cleansing, depuration

afraid [ə'fred] 词频1

adj. 害怕的;担心的;恐怕;畏惧，害怕;

💡 词根af-向，词缀raid打、袭击，“担心挨打

"It's all over. There's nothing to be afraid of now."

近义：apprehensive, intimidated, nervous, awed, awestricken, awestruck 反义：intrepid, mettlesome, nervy, audacious, plucky, rash

kill [kɪl] 词频1

vt.& vi. 杀死…; vt. 使停止[结束，失败];破坏，减弱，抵消;使痛苦，使受折磨;使笑得前仰后合，使笑死了; n. 杀死;猎;被捕杀的动物;猎物; adj. 致命的;

💡 作“杀”的手势，说“k”掉那只鸡。

"An increase in crime could kill the golden goose of tourism."

近义：ice, liquidate, assassinate, murder, obliterate, shoot 反义：enliven