English edit

Etymology edit

against +‎ -er

Noun edit

againster (plural againsters)

  1. One who opposes something.
    Synonyms: anti, oppositionist
    • 1944, Morris Allison Bealle, Washington Squirrel Cage, page 9:
      They felt that the fellow was a quockerwodger rather than a politician, an againster rather than a true American, an oppositionist in fundamental things rather than a sincere patriot.