adjunctive

/əˈdʒʌŋktɪv/
adjective
  1. Serving as an addition or supplement; not primary or essential.
    • Adjunctive materials like workbooks can help students learn more effectively.
    • The doctor recommended adjunctive therapy to support the main treatment.
    • The committee's role is adjunctive, providing advice rather than making final decisions.
Antonyms
What does "adjunctive" mean? | whatsthatwordmean | whatsthatwordmean