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.
See also: not, word
Farlex Dictionary of Idioms.

not the word for it

not 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.
See also: not, word
Farlex Partner Idioms Dictionary
See also:
  • be not the word for it
  • not be the word for it
  • get out of my sight
  • get (one's) shirt out
  • wax angry
  • wroth
  • throw (one's) toys out of the pram
  • throw your toys out of the pram
  • rile
  • be/get riled up