ruining

1. To cause the fiscal ruin of.

   With all these purchases, you surely mean to ruin us!

2. To destroy or make something no longer usable.

   He ruined his new white slacks by accidentally spilling oil on them.

3. To cause severe financial loss to; to bankrupt or drive out of business.

   The crooked stockbroker's fraudulent scheme ruined dozens of victims; some investors lost their life savings and even their houses.

4. To upset or overturn the plans or progress of, or to have a disastrous effect on something.

   My car breaking down just as I was on the road ruined my vacation.

5. To make something less enjoyable or likeable.

   I used to love that song, but being assaulted when that song was playing ruined the song for me.

6. To reveal the ending of (a story); to spoil.
7. To fall into a state of decay.
8. To seduce or debauch, and thus harm the social standing of.

   The young libertine was notorious for ruining local girls.

noun

The act or process by which something is ruined.