intensify

The solitary window was so dirty that the light was hazy and uncertain, giving a dull grey tinge to everything, which was intensified by the thick layer of dust which coated the whole apartment.

Violence of temper approaching to mania has been hereditary in the men of the family, and in my stepfather’s case it had, I believe, been intensified by his long residence in the tropics.

The man he sacrificed to his ambition, that innocent victim immolated on the altar of his father’s faults, appeared to him pale and threatening, leading his affianced bride by the hand, and bringing with him remorse, not such as the ancients figured, furious and terrible, but that slow and consuming agony whose pangs are intensified from hour to hour up to the very moment of death.

Meanwhile, Villefort and d’Avrigny had made all possible haste, Valentine had not revived from her fainting fit on their arrival, and the doctor examined the invalid with all the care the circumstances demanded, and with an interest which the knowledge of the secret intensified twofold.