"tending to exclude," 1817, from exclusion + -ary.
Entries linking to exclusionary
exclusion n.
"act of shutting out; non-inclusion," c. 1400, exclusioun, from Latin exclusionem (nominative exclusio) "a shutting out," noun of action from past-participle stem of excludere "keep out, shut out," from ex "out" (see ex-) + claudere "to close, shut" (see close (v.)).
-ary
adjective and noun word-forming element, in most cases from Latin -arius, -aria, -arium "connected with, pertaining to; the man engaged in," from PIE relational adjective suffix *-yo- "of or belonging to." The neuter of the adjectives in Latin also were often used as nouns (solarium "sundial," vivarium, honorarium, etc.). It appears in words borrowed from Latin in Middle English. In later borrowings from Latin to French, it became -aire and passed into Middle English as -arie, subsequently -ary.