Ela

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Across
  1. 2. secretly listen to a conversation.
  2. 3. a grassy plain in tropical and subtropical regions, with few trees
  3. 4. the location of objects by reflected sound, in particular that used by animals such as dolphins and bats
  4. 7. prevent (something considered wrong or undesirable) from succeeding
  5. 8. an animal that naturally preys on others
  6. 9. a sum of money or something else of value gambled on the outcome of a risky game or venture
  7. 10. fall or drop straight down at high speed
Down
  1. 1. of or involving sound waves with a frequency above the upper limit of human hearing
  2. 5. emitting light not caused by heat
  3. 6. obstruct (someone or something) so as to prevent them from continuing to a destination.