淡化

to water down / to play down / to trivialize / to weaken / to become dull with time / to desalinate / desalination

insipid / diluted / weak / mild / light in color / tasteless / indifferent / (variant of 氮[dan4]) nitrogen

variant of 花[hua1]

to make into / to change into / -ization / to ... -ize / to transform / abbr. for 化學|化学[hua4 xue2]