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! Sad isn't the word for what they've done: it's disgusting.
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.