Synonyms for Impoverish:

n.

bankrupt, damage, disfigure, exhaust, harm, hurt, injure, mar, mark, ruin, spoil, stain, take its toll. acquire, ascent, beggar, break, bust, clean out, climb, come out, comedown, descend, disestablish, money, pauperize. deplete, drain, give, increase, rich, sap, use up. impoverish (noun)
deprive.

v.

change (verb)
deprive.
make poor (verb)
bankrupt, deplete, exhaust, ruin.

Other synonyms:

pauperize. bankrupt, deplete. exhaust. drain. bust. break. ruin
clean out, pauperize, ruin.
Other relevant words:
acquire, ascent, bankrupt, beggar, break, bust, clean out, comedown, damage, deplete, descend, disestablish, disfigure, drain, exhaust, give, harm, hurt, increase, injure, mar, mark, money, pauperize, rich, ruin, sap, spoil, stain, use up.

Usage examples for impoverish

  1. They may enrich or they may impoverish his personality. – The Five Great Philosophies of Life by William de Witt Hyde
  2. In the hope, as he said, of hastening on the peace, Vincent told all that he knew of the plans and resources of the outlawed chiefs; and, in consequence, the French at length proceeded to vigorous action, believing that if they could force the post at the Plateaux, they could so impoverish and disable the negro leaders as to compel them to become mere banditti, who might be kept in check by guarding the mountain- passes. – The Hour and the Man An Historical Romance by Harriet Martineau
  3. And is it not a pity to impoverish our county by making the bulk of its land useless? – The Squatter and the Don by C. Loyal