No Ruinous Feud was created in 1973-01.

The city had suffered a ruinous series of natural disasters.

The couple's lifestyle resulted in ruinous personal debt, and eventual bankruptcy.

The girl was trying be ruinous to the other students.

The root word of "ruinous" is "ruin," which means to destroy or bring to an end.

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