Dilute or Concentrated

Dilute: To diminish the strength by admixture;

usually refers to a solution

a solid dissolved in a liquid (weight / volume; w/v)
or a liquid dissolved in a liquid (volume /volume, v/v; or weight / weight, w/w).

Frequently specifically means a 10% solution.

Concentrated: A solution increased in strength by elimination of the liquid;

usually refers to a solution,
e.g., conc. HCl = 37% HCl w / v in water.