letter-perfect

/L EH1 T ER0 P ER0 F EH0 K T/
adjective
  1. 1

    Exactly correct, correct in every letter.

    โ€œHe was able to write out the speeches of Hamlet, letter perfect. It was impressive to see how exactly he knew the wording.โ€

Antonyms

Source: https://en.wiktionary.org/wiki/letter-perfect