ersatz
/eəˈzætz/adjective
1- (of a product) made or used as a substitute, typically an inferior one, for something else（产品）代用的：
ersatz coffee.
代用咖啡。
1.1
- not real or genuine假的：
ersatz emotion.
虚假的情感。
词源
late 19th cent.: from German, literally 'replacement'.