infective

a. 1. Capable of, or pertaining to, inflection; deflecting; as, the inflective quality of the air. Derham. [ 1913 Webster ]

2. (Gram.) Inflectional; characterized by variation, or change in form, to mark case, tense, etc.; subject to inflection. [ 1913 Webster ]

Inflective language (Philol.), a language like the Greek or Latin, consisting largely of stems with variable terminations or suffixes which were once independent words. English is both agglutinative, as, manlike, headache, and inflective, as, he, his, him. Cf. Agglutinative. [ 1913 Webster ]