Silent Letters

123456
Across
  1. 3. an instrument for cutting, consisting essentially of a thin, sharp-edged, metal blade fitted with a handle.
  2. 4. a systematic course of aggressive activities for some specific purpose
  3. 6. a mechanical contrivance or device; any ingenious article
Down
  1. 1. the one or ones belonging to what person or persons
  2. 2. of pertaining to, or derived from another country or nation; not native
  3. 3. acquaintance with facts, truths, or principles, as from study or investigation; general erudition
  4. 5. noting any member or part of a vessel assembled from pieces