Anodyne

adjective/AN-uh-dyne/

Meaning

So mild and inoffensive that it upsets nobody, sometimes to the point of being boring.

In context
His anodyne review said the book was 'nice' without praising or criticising it.

Remember it

An 'anodyne' was once a pain-soother; now it soothes by being safe and dull.

Use it well

Use it when something is deliberately safe and vague, often with mild disapproval.