not the word for it
be not the word for it
Of a word or phrase, to not fully or adequately describe something. Angry? Angry isn't the word for it—I'm blinded with rage! Bad isn't the word for what they've done. It's despicable.
not the word for itnot an adequate or appropriate description.
1992 European Travel & Life The landscape of Alaska has the power to overwhelm. ‘Beautiful’ is not the word for it.