gravamen

英 [grə'veɪmen]

gravamen (n.): 1640s, "grievance," from Late Latin gravamen "trouble, physical inconvenience" (in Medieval Latin, "a grievance"), literally "a burden," from Latin gravare "to burden, make heavy, weigh down; oppress," from gravis "heavy" (see grave (adj.)). Specifically, in law, "part of the accusation which weighs most heavily against the accused." Related: Gravaminous.