R / rĕbellātrix
noun

rĕbellātrix

gen. rĕbellātrīcis · gender feminine · decl. 3rd
she that revolts; rebels
she that revolts or rebels (very rare): Germania, Ov. Tr. 3, 12, 47: provincia, Liv. 40, 35 fin.; Amm. 14, 8, 2.