ruinous

Meanings

1. 1
   adj

   So expensive that it could destroy you financially.

   They had to replace the entire roof at ruinous expense.

2. 2
   adj

   Causing terrible damage or destruction.

   The war had a ruinous effect on the country's economy.

From Middle English ruynous, from Old French ruinos, ruineus, from Latin ruīnōsus. By surface analysis, ruin + -ous.

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