i_e, y, igh, i, ie

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Across
  1. 1. Fashionable and elegant
  2. 4. The weather conditions in an area over a long period
  3. 5. The time of day just after sunset
  4. 8. Shaped like a three-sided figure
Down
  1. 2. Exactly alike in every way
  2. 3. To cause strong feelings of enthusiasm
  3. 6. A piece of land surrounded by water
  4. 7. Slanting line connecting non-adjacent corners