heinous - HAY-nus - evil or wicked to the extreme, abominable
Example: "The latest truck bomb suicide in Pakistan continues the heinous war crimes committed by the Taliban."
As a starter: and as a former teacher in English, I hope to add to reader's vocabulary by presenting a word a day in simple terms that anyone can understand - from current use in publications, radio,TV, etc. Remember: use a new word three times in a day and it's yours forever!