Meaning of “depreciate” - Learner’s Dictionary

depreciate

verb [ I ] uk us /dɪˈpriːʃieɪt/

to lose value over a period of time:

New computers depreciate in value very quickly.
depreciation uk us /dɪˌpriːʃiˈeɪʃən/ noun [ U ]

(Definition of “depreciate” from the Cambridge Learner’s Dictionary © Cambridge University Press)