truly

/ˈtruːli/
adverb
  1. In a truthful or sincere way; genuinely.
    • I am truly grateful for your help.
    • She truly believed that hard work would pay off.
    • He spoke truly when he said he was sorry for the mistake.
  2. Used to emphasize that something is real or exact; really.
    • It is a truly unique opportunity to learn from experts.
    • The view from the mountain was truly breathtaking.
    • That was a truly amazing performance.
  3. Used as a formal closing in letters (e.g., 'Yours truly').
    • She ended her letter with 'Yours truly, Sarah.'
    • The application was signed 'Yours truly' at the bottom.
    • In formal correspondence, 'Yours truly' is still sometimes used.
Antonyms
What does "truly" mean? | whatsthatwordmean | whatsthatwordmean