ren ‧ e ‧ gade /ˈrenəɡeɪd, ˈrenɪɡeɪd/ BrE AmE noun [countable] literary
[ Date: 1400-1500 ; Language: Spanish ; Origin: renegado , from Medieval Latin renegare 'to say that something is not true' , from Latin negare ; ⇨ ↑ negate ]
someone who leaves one side in a war, politics etc in order to join the opposing side – used to show disapproval:
a renegade army unit