cheapen (v.)youdaoicibaDictYouDict[cheapen 词源字典]
1570s, "ask the price of," from cheap (adj.) + -en (1). Meaning "lower the price of" is from 1833, but figuratively, "to lower in estimation" is from 1650s. Related: Cheapened; cheapening.[cheapen etymology, cheapen origin, 英语词源]