0 present participle of ruin
1 to spoil or destroy something completely:
A modern extension on the old building would ruin its architectural integrity.
Lucy has just ruined her new dress. That's children for you.
I think the new extension ruins the proportions of the building.
The finance 2 system was literally ruining the soil.
This of course drives up the variance of the entire strategy, possibly ruining the usefulness of the result.
Reports of attacks on crops took two key forms: either deliberate trampling or the letting of animals into the field, thereby ruining the crop.