An Etymological Dictionary of Astronomy and Astrophysics

1. To put down by authority or force.
   

2. To keep from public knowledge.
   

3. To restrain from a usual course or action. → suppression.

Etymology (EN): L. suppressus, p.p. of supprimere “to press down, stop, stifle,” from → sub- “down, under” + premere “to press, push against,” → express.

Etymology (PE): Nehâvidan, from ne-, → ni- “down, below,” + hâvidan “to press,” → express.