Lewis & Short

subjectīvus, a, um, adj. [subjectus], of or belonging to the subject of a proposition, subjective: pars, i. e. the subject, App. Dogm. Plat. 3, p. 30, 30; Mart. Cap. 4, § 393; Tert. Virg. Vel. 4 fin.
Adv.:
subjectīvē, subjectively, Mart. Cap. 4, § 393.