Essential
Essential adjective - Impossible to do without.
Indefeasible and essential are semantically related. In some cases you can use "Indefeasible" instead an adjective "Essential".
Indefeasible
Indefeasible adjective - Not liable to being annulled or voided or undone.
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Synonyms for Indefeasible
Essential and indefeasible are semantically related. Sometimes you can use "Essential" instead an adjective "Indefeasible".
Cite this Source
Indefeasible and Essential. (2016). Retrieved 2026, July 28, from https://thesaurus.plus/related/essential/indefeasible
Essential & Indefeasible. N.p., 2016. Web. 28 Jul. 2026. <https://thesaurus.plus/related/essential/indefeasible>.
Indefeasible or Essential. 2016. Accessed July 28, 2026. https://thesaurus.plus/related/essential/indefeasible.
Google Ngram Viewer shows how "essential" and "indefeasible" have occurred on timeline