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Definition of thicken:

  1. To become thick.
  2. To make close; to fill up interstices in; as, to thicken cloth; to thicken ranks of trees or men.
  3. To make more frequent; as, to thicken blows.
  4. To make thick ( in any sense of the word).
  5. To render dense; to inspissate; as, to thicken paint.
  6. To strengthen; to confirm.


clear, petrify, reinforce, add, solid, bubble, boil over, freeze, decrease, atomize, condense, cloud, ossify, clot, boil, stiffen, boil up, buttress, flow, break down, curdle, inspissate, boil away, bake, thaw.

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