downgrader
That which downgrades.
(Ireland, colloquial) an unsavoury and unreliable (usually male) layabout.
(chiefly Britain) educated people with liberal opinions and attitudes
(medicine, rare) Synonym of allogeneic
レビューシステムの格下げを行う仕組みが、予期せず一晩でそのホテルの評価を下げてしまった。
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