adulterate [adulterated, adulterating, adulterates](to make less valuable or spoil (something) by adding impurities or other substances) verb [UK: ə.ˈdʌl.tə.reɪt] [US: ə.ˈdəl.tə.ˌret]
摻假 /chānjiǎ/ noun
adulteration [adulterations](The action of adulterating) noun [UK: ə.ˌdʌl.tə.ˈreɪ.tʃn̩] [US: ə.ˌdʌl.tə.ˈreɪ.tʃn̩]