- ruinously
-
1. causing great damage to something:
• a ruinous civil war
2. FINANCE costing a lot more than you can afford:• the prospect of ruinous legal costs
— ruinously adverb :• ruinously high interest rates
* * *
ruinous UK US /ˈruːɪnəs/ adjective► causing great harm or destruction: »The bank had capital to spare, which they lost in a series of ruinous takeovers.
be ruinous to sth »The proposed bill is ruinous to the home building industry.
ruinously adverb► »It is ruinously expensive for local e-commerce companies to accept credit cards online.
Financial and business terms. 2012.