sorry another 'negative' word.vi·ti·ate (vsh-t)
tr.v. vi·ti·at·ed, vi·ti·at·ing, vi·ti·ates
1. To reduce the value or impair the quality of.
2. To corrupt morally; debase.
3. To make ineffective; invalidate. See Synonyms at corrupt.
[Latin vitire, vitit-, from vitium, fault.]
viti·a·ble (vsh--bl) adj.
viti·ation n.
viti·ator n.
The American Heritage® Dictionary of the English Language, Fourth Edition copyright ©2000 by Houghton Mifflin Company. Updated in 2003. Published by Houghton Mifflin Company. All rights reserved. http://www.thefreedictionary.com/vitiate
mark thinking-about-the-vitiating-effects-of-insects-on-fallen-trees-and-leaves Bailey