silently

adverb2

1. •
   In a silent manner; making no noise.

   • It often happens that the most important results in the natural world are brought about by causes which operate silently, if not imperceptibly. — 1838
2. •
   Of an edit or change to a text, without explicit acknowledgment.

   • There never was an English-language text, either in 1561 or 1859. Yule and Burnell have silently provided a translation. — 2018