Learn English – What’s the proper word for “ignorable”

word-choiceword-request

What's the proper adjective to describe something that should not be ignored? My intuition is that it should be "not ignorable", but my chrome spell checker doesn't think that is a correct word, and when I looked it up, I found it is only "Austral, informal". Hence the question. Thanks.

Note,

  • I want to say "not ignorable", instead of something like "significant" or alike.
  • I also tried "neglectable", but my chrome spell checker doesn't think it is a correct word either. And besides, I think the meaning is slightly off as well.

Supplement:

For the context of the question — this is meant for a business environment, when delivering some minor negative news. I want to be polite and respectful of my audience, but make them aware of something – to call their attention to it.

Best Answer

The proper word is "ignorable":

You may be confusing the Australian usage of ignore as a noun, which is non-standard, with the completely acceptable, regular formation of an adjective from a verb by appending the suffix "-able".

Example: "... certain types of response error are not ignorable..." https://books.google.co.uk/books?id=FS-x3tPdXeMC&pg=PA229&dq=%22not+ignorable%22&hl=en&sa=X&ved=0ahUKEwjxmJS_8vbPAhXJL8AKHfKMBPwQ6AEIHjAA#v=onepage&q=%22not%20ignorable%22&f=false