Undermost and Upper

Opposite meaning words

Undermost adjective - Of, relating to, or located at the bottom.

Usage example: the undermost layer of the mattress filling should provide firm back support

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Upper is an antonym for undermost.

Upper adjective - Higher in place or position.

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Undermost is an antonym for upper.

Cite this Source

Upper and Undermost. (2016). Retrieved 2026, August 14, from https://thesaurus.plus/related/undermost/upper

Undermost & Upper. N.p., 2016. Web. 14 Aug. 2026. <https://thesaurus.plus/related/undermost/upper>.

Upper or Undermost. 2016. Accessed August 14, 2026. https://thesaurus.plus/related/undermost/upper.

Google Ngram Viewer shows how "undermost" and "upper" have occurred on timeline