Ruinous

King James Dictionary

Ru'Inous, a.  50ruinosus.

1. Fallen to ruin entirely decayed demolished dilapidated as an edifice, bridge or wall in a ruinous state. 2. Destructive baneful pernicious bringing or tending to bring certain ruin. Who can describe the ruinous practice of intemperance? 3. Composed of ruins consisting in ruins as a ruinous heap.  Isaiah 17 .

Webster's Dictionary

(1): ( a.) Characterized by ruin; ruined; dilapidated; as, an edifice, bridge, or wall in a ruinous state.

(2): ( a.) Causing, or tending to cause, ruin; destructive; baneful; pernicious; as, a ruinous project.

(3): ( a.) Composed of, or consisting in, ruins.