costing a lot of money and more than you can afford 耗資巨大的；無法承擔的 ruinous legal fees 巨額法律費用 They were forced to sell out at a ruinous loss. 他們被迫出售，損失慘重。
causing serious problems or damage 破壞性的；導致嚴重問題的；災難性的 The decision was to prove ruinous. 後來證明這個決定造成了極大的損害。 Such action would be ruinous to her career. 這樣的行爲將會對她的事業造成毀滅性的打擊。 a ruinous mistake 毀滅性的錯誤
(of a town, building, etc. 城鎮、建築等 destroyed or severely damaged 破敗的；嚴重受損的；已成廢墟的
Word Originlate Middle English (also in the sense ‘falling down’): from Latin ruinosus, from ruina, from ruere ‘to fall’.