Ruinous(a.) Causing, or tending to cause, ruin; destructive; baneful; pernicious; as, a ruinous project.
Ruinous(a.) Characterized by ruin; ruined; dilapidated; as, an edifice, bridge, or wall in a ruinous state.
Ruinous(a.) Composed of, or consisting in, ruins.
Words within ruinousness