subventionary
/səbˈvɛnʃ(ə)n(ə)ri/ /səbˈvɛnʃən(ə)ri/adjective
Of the nature of a subvention; of or relating to the granting of subventions.
Origin
Mid 19th century; earliest use found in Thomas Carlyle (1795–1881), author, biographer, and historian. From subvention + -ary.