Understanding Common Word Suffixes: Beyond Medical Terminology

The suffixes -ac, -ary, -al, -ic are general English adjective-forming suffixes, not exclusive to medical terminology.

  • -ac (from Latin -acus): cardiac, maniac, lilac
  • -ary (from Latin -arius): primary, stationary, dictionary
  • -al (from Latin -alis): clinical, manual, seasonal
  • -ic (from Greek -ikos): specific, neurologic, artistic

They appear across all domains—scientific, legal, literary, everyday language. Medical terms adopt them because they derive from Latin/Greek roots.

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