From The Grammar of Heraldry by Samuel Kent, p17-19

Kent’s text names nine abatements, eight of which are shown above. Below are the names and descriptions of each:

“He beareth Argent, a Delfe, Tenne: This is due to him that revoketh his Challenge, or eateth his words.

“He beareth Or, and Escocheon reversed, Sanguine; This is given to him that discourteously useth a Maid or Widow, against her will, or flies from his Sovreign’s Banner.

He beareth Argent, a Point dexter parted: Given to a meer Braggadochio.

He beareth Or, a Point in Point, Sanguine: Which is due to one that does not demean himself well in Fight.

He beareth Or, a Point Champaigne, Tenne. A Diminution due to one that kills his Prisoner.

He beareth Or, a Plain Point, Sanguine. The Mark of a Tale-Bearer and Liar.

He beareth Argent, a Gore sinister, Tenne. The Reward of a Coward.

He beareth Argent, two Gussets, Sanguine. In Abatement there can be but one Gusset; and he that is given to Lust shall wear it on the right Side, a Drunkard on the left. But two Gussets together do not imply a Disgrace…

The last (and worst) kind of Abatement, is call’d Reversing, and that is, when the whole Escocheon is turned upside down, contrary to the usual form of bearing: This is never given but to the finish’d Traitor.”

(I should note that there is no historical or heraldic evidence that any of these charges were ever practically used as abatements. The last mentioned was part of the execution of a traitor; his arms would be borne upside down on his way to the place of execution. It was a high disgrace, but one that never lasted for more than a few hours.)