"ruinous" in the adjective sense

1. catastrophic, ruinous

extremely harmful bringing physical or financial ruin

"a catastrophic depression"

"catastrophic illness"

"a ruinous course of action"

2. blasting, ruinous

causing injury or blight especially affecting with sudden violence or plague or ruin

"the blasting effects of the intense cold on the budding fruit"

"the blasting force of the wind blowing sharp needles of sleet in our faces"

"a ruinous war"

Source: WordNet® (An amazing lexical database of English)

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