Greek-English translations for πλήκτρο

• key
  The key to solving this problem is persistence
  the key to winning a game
  The key says that A stands for the accounting department
• hammer
  St. Augustine was the hammer of heresies.
  I could hear the engine’s valves hammering once the timing rod was thrown.
  We hammered them 5-0!
• note
  I left him a note to remind him to take out the trash
  a promissory note
  a note of hand
• plectrum