eg: 1)The pain was already lessening.
1.I hope to obtain your forgiveness, to your opinion.
（強調”reduce"）譯：我希望得到妳的原諒，減輕妳對我的看法。
2.decreasev. to become less in number or amount:
eg:1)The average rainfall has decreased by around 30 percent.
2) The effectiveness of the drug gradually decreases.
The number of nations allied with Germany as the war continued. （表示“數量”的減少）
譯：戰爭繼續進行，德國的同盟國減少。
3.dropv. to decrease, especially by a large amount: (= fall)
eg: 1)The number of tigers in the wild has fallen/dropped to just over 10,000.
2) At night, the temperature drops to minus 20 degrees.
3) Profits fell from ?98.5 million to ?76 million.
4) In May, the price of coffee dropped by over 20%.
The incidence of malaria dramatically because of eradication of malarial mosquitos.（表示“數量”的大幅減少，因為句中有壹個詞“dramatically”） 譯：因為消滅了毒蚊子，所以痢疾的發生率大幅下降。
4.dwindle v. to gradually decrease until there is very little left of something. Dwindle is used about numbers or amounts. It is also used when saying that somethingbecomes less popular, less importantetc:
eg: 1)The birds' numbers have slowly dwindled, until there are now only about 600 left in the world.
2) Traffic along the canals dwindled during the 20th century.
Classes as more and more students played truant.（表示“數量”的減少，且這個過程是“漸漸的”直至只有很少壹部分留下） 譯：越來越多的學生曠課，所以班級數量逐漸減少。