depreciate
verb [ I or T ] uk/dɪˈpriː.ʃi.eɪt/ us/dɪˈpriː.ʃi.eɪt/
（尤指随时间的推移）（使）贬值，（使）跌价
to (cause something to) lose value, especially over time
Our car depreciated (by) $1,500 in the first year we owned it. 我们买的车第一年就贬值了1500美元。
In the last year our house has depreciated in value. 我们的房子在过去一年间贬值了。
Compare: appreciate (INCREASE)