Trains

TRAIN increases one of your attributes. When you start the game, your
character has standard attributes based on your class, and several
initial training sessions. You can increase your attributes by
using these sessions at a trainer (there is one in the Training School).

Initially, it costs little to increase your stats, but at set intervals,
the cost for increasing a particular stat will increase, sometimes quite
drastically. Stats can be trained to 50 in most cases, thought remort
races may be able to further increase these. The quest skill Gifted
allows stats such as str, int, wis, etc, to be trained much higher.

You can also Train # where number is 1-5.
This will increase the stat by # at a cost of training points times #.