downgrade

US /ˌdaʊnˈɡreɪd/
UK /ˌdaʊnˈɡreɪd/
1.

ダウングレード

to reduce someone or something to a lower rank or position, or to cause something to be considered less important or valuable:

:
My job's been downgraded to that of ordinary editor.
1.

ダウングレード

the process of downgrading:

:
A credit rating downgrade would raise their cost of borrowing.