1 optimization

2 to optimize

3 to make superior

1 variant: 花 huā

1 to put on makeup

1 cosmetic

2 makeup product

1 chemistry

2 chemical

1 to use an opponent's own methods to obtain retribution (idiom, from Song dynasty neo-Confucianist Zhu Xi 朱熹); to get revenge by playing sb back at his own game

2 to give sb a taste of his own medicine

1 the full light of day (idiom)

2 fig. peace and prosperity

3 in broad daylight

1 to reach perfection (idiom); a superb artistic achievement

1 lit. to exchange weapons of war for gifts of jade and silk (idiom)

2 fig. to turn hostility into friendship

1 to break up the whole into pieces (idiom); dealing with things one by one

2 divide and conquer