batten

To become better; improve in condition, especially by feeding.

To feed (on); to revel (in).

To thrive by feeding; grow fat; feed oneself gluttonously.

To thrive, prosper, or live in luxury, especially at the expense of others; fare sumptuously.

To gratify a morbid appetite or craving; gloat.

To improve by feeding; fatten; make fat or cause to thrive due to plenteous feeding.

To fertilize or enrich, as land.