Type 'help skillname' in the game for information as to the effects and purpose of each skill.
For instance, if you wanted to know what the level 35 skill 'stun' did, you would type 'help stun'.
Knight Skills
Knight
Level Abilities
32: dodge
35: stun
37: redirect
40: retreat
42: skewer
44: riposte
48: rescue
52: fourth attack
55: disembowel
58: shield bash
60: defense