ruinous B2 Topic:Money & Finance US /ˈɹuː.ɪnəs/ See IPA manual Freq #52167 Meanings 1 adj So expensive that it could destroy you financially. They had to replace the entire roof at ruinous expense. 2 adj Causing terrible damage or destruction. The war had a ruinous effect on the country's economy. Thesaurus Synonyms 2 adj · causing terrible damage or... catastrophicdestructive Word family Derived forms ruinouslyruinousness Common collocations ruinous war Adjective + noun Etymology AI details From Middle English ruynous, from Old French ruinos, ruineus, from Latin ruīnōsus. By surface analysis, ruin + -ous. ruynous Middle English ruinos Old French ruīnōsus Latin View etymology graph -> Topics Money & Finance External links Cambridge Dictionary Wiktionary Google Images # ruinous **Type:** Word **Level:** B2 **Part of speech:** adj **IPA (US):** /ˈɹuː.ɪnəs/ **Frequency rank:** 52167 ## Meanings 1. So expensive that it could destroy you financially. 2. Causing terrible damage or destruction. ## Examples - They had to replace the entire roof at ruinous expense. - The war had a ruinous effect on the country's economy. ## Derived Forms - ruinously - ruinousness ## Roots and Affixes - Root: ruynous - Root: ruinos - Root: ruīnōsus ## Etymology From Middle English ruynous, from Old French ruinos, ruineus, from Latin ruīnōsus. By surface analysis, ruin + -ous. ## AI Etymology Ruinous comes from Middle English ruynous, from Old French ruinos, ruineus, from Latin ruīnōsus. By surface analysis, ruin + -ous. Modern senses include so expensive that it could destroy you financially. and causing terrible damage or destruction.. The wider word family includes derivatives such as ruinously and ruinousness. ## Topics - Money & Finance markdown