Answer: effloresces

AnswerCrossword Clue
effloresces(of salts) Come to the surface of brickwork, rock, or other material and crystallize there
efflorescesReach an optimum stage of development; blossom
effloresces(of a substance) Lose moisture and turn to a fine powder upon exposure to air
efflorescesEFFLORESCE, to flower; burgeon; (chem.) to become powder when exposed to air
effloresces(of a surface) Become covered with salt particles