li·ti·gious 
(lĭ-tĭjəs)
(lĭ-tĭjəs)adj.
1. Of, relating to, or characterized by litigation.
2. Tending to engage in lawsuits.
[Middle English, from Old French, from Latin lītigiōsus, from lītigium, dispute, from lītigāre, to quarrel; see LITIGATE.]
li·tigious·ly adv.
li·tigious·ness n.