devalue
verb uk/ˌdiːˈvæl.juː/ us/ˌdiːˈvæl.juː/
(MONEY)
[ I or T ]（使）贬值
to reduce the rate at which money can be exchanged for foreign money
Last year Mexico was forced to devalue the peso. 去年墨西哥被迫将比绍贬值。
(NOT VALUE)
[ T ]贬低；轻视
to cause someone or something to be considered less valuable or important
I don't want to devalue his achievement, but he managed to get a promotion without working very hard. 我不想贬低他的成绩，但他似乎没有真正努力就得到了升迁。