I learned a new word today. It is “gravamen.” It is from the Latin “gravare,” “to weigh down,” so literally it means “that which is heaviest.” It is a legal term http://en.wikipedia.org/wiki/Gravamen that refers to the most serious part of a suit against someone and/or the basis of a lawsuit. Its extended, non-judicial meaning is “the essence of an objection,” as in, “My gravamen against your character is that you are flagitious!!”