Thayer's Greek Lexicon

 1. to bear down, bring down, cast down
  1) to cast a pebble or calculus into the urn
1a1. to give one's vote, to approve
  2) to be born down, to sink, (from the window to the pavement)
  3) metaph.
1c1. to be weighted down by, overcome, carried away
1c2. to sink into sleep, drop asleep