R / rē^frāgĭum
noun

rē^frāgĭum

gen. rē^frāgii · gender neuter · decl. 2nd
resistance; opposition
resistance, opposition (eccl. Lat.), Ambros. in Psa. 35, § 17.—
a hinderance; obstacle
Concr., a hinderance, obstacle, Ambros. in Ep. 37, § 30.