de·pre·ci·ate 
/dɪˈpri:ʃiˌeɪt/ verb
de·pre·ci·ates; de·pre·ci·at·ed; de·pre·ci·at·ing /dɪˈpri:ʃiˌeɪt/ verb 1 a [+ obj] : to cause (something) to have a lower price or value
▪ These changes have greatly depreciated the value of the house.
b [no obj] : to decrease in value
▪ New cars depreciate rapidly. ▪ The value of the house has depreciated greatly. — opposite appreciate 2 [+ obj] formal : to describe (something) as having little value
▪ He often depreciates [=disparages, belittles] the importance of his work.
▪ These changes have greatly depreciated the value of the house.
b [no obj] : to decrease in value
▪ New cars depreciate rapidly. ▪ The value of the house has depreciated greatly. — opposite appreciate
▪ He often depreciates [=disparages, belittles] the importance of his work.
