ruinous

 
Pronunciation: /ˈruːɪnəs/

adjective

  • 1disastrous or destructive: a ruinous effect on the environment
  • costing far more than can be afforded: the cost of their ransom might be ruinous
  • 2in ruins; dilapidated: the castle is ruinous

Derivatives

ruinously

adverb

ruinousness

noun

Origin:

late Middle English (also in the sense 'falling down'): from Latin ruinosus, from ruina (see ruin)