Russian-English translations for предлог

• excuse
  I excused him his transgressions.
  May I be excused from the table?
  I excused myself from the proceedings to think over what Id heard.
• preposition
  It is important to preposition the material before turning on the machine.
• pretence
• pretext
  The reporter called the company on the pretext of trying to resolve a consumer complaint.
  The spy obtained his phone records using possibly-illegal pretexting methods.