Possible Clues:

• Injured indelicately
• Jabbed with a joint
• Word with ''knock'' or ''weak''
• Launched a joint attack?
• Hit with a low blow, in a way
• Sounds as if one might want to be struck like this
• Kicked with a bent leg
• Struck in kickboxing, in a way
• Word with "knock" or "weak"
• Hit below the belt?