Anodyne
As a noun anodyne refers to something that brings down pain. As an adjective, it is used when something that intends to avoid being offensive and thus ends up being dull and boring.
Origin:
The word anodyne comes from Latin anodynum meaning “something allaying pain”, and originally borrowed from the Greek word anodynon, which meant “freedom from pain”.
Example:
It was such an anodyne review for an awful concert.
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