Ruin \Ru"in\, v. t. [imp. & p. p. Ruined;p. pr. & vb. n. Ruining.]

[Cf. F. ruiner, LL. ruinare. See Ruin, n.]

To bring to ruin; to cause to fall to pieces and decay; to make to perish; to bring to destruction; to bring to poverty or bankruptcy; to impair seriously; to damage essentially; to overthrow.

this mortal house I'll ruin. --Shak.

By thee raised, I ruin all my foes. --Milton.

The eyes of other people are the eyes that ruin us. --Franklin.

By the fireside there are old men seated, Seeling ruined cities in the ashes. --Longfellow.

Source: Webster's Revised Unabridged Dictionary (1913)