costing a lot of money and more than you can afford 耗资巨大的；无法承担的 ruinous legal fees 巨额法律费用 They were forced to sell out at a ruinous loss. 他们被迫出售，损失惨重。
causing serious problems or damage 破坏性的；导致严重问题的；灾难性的 The decision was to prove ruinous. 后来证明这个决定造成了极大的损害。 Such action would be ruinous to her career. 这样的行为将会对她的事业造成毁灭性的打击。 a ruinous mistake 毁灭性的错误
(of a town, building, etc. 城镇、建筑等 destroyed or severely damaged 破败的；严重受损的；已成废墟的
Word Originlate Middle English (also in the sense ‘falling down’): from Latin ruinosus, from ruina, from ruere ‘to fall’.