All-important and Supplementary

Opposite meaning words

All-important adjective - Impossible to do without.

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Supplementary is an antonym for all-important.

Supplementary adjective - Available to supply something extra when needed.

Usage example: the teacher's edition of the textbook comes with a lot of supplementary material

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All-important is an antonym for supplementary.

Cite this Source

Supplementary and All-important. (2016). Retrieved 2026, August 15, from https://thesaurus.plus/related/all-important/supplementary

All-important & Supplementary. N.p., 2016. Web. 15 Aug. 2026. <https://thesaurus.plus/related/all-important/supplementary>.

Supplementary or All-important. 2016. Accessed August 15, 2026. https://thesaurus.plus/related/all-important/supplementary.