Erstwhile
Erstwhile adverb - At an earlier or previous time.
Theretofore and erstwhile are semantically related. In some cases you can replace term "Theretofore" with "Erstwhile", this adverbs are similar.
Theretofore
Theretofore adverb - Up to this or that time.
Erstwhile and theretofore are semantically related. Sometimes you can use "Erstwhile" instead an adverb "Theretofore".
Mutual synonyms
Cite this Source
Theretofore and Erstwhile. (2016). Retrieved 2026, July 29, from https://thesaurus.plus/related/erstwhile/theretofore
Erstwhile & Theretofore. N.p., 2016. Web. 29 Jul. 2026. <https://thesaurus.plus/related/erstwhile/theretofore>.
Theretofore or Erstwhile. 2016. Accessed July 29, 2026. https://thesaurus.plus/related/erstwhile/theretofore.
Google Ngram Viewer shows how "erstwhile" and "theretofore" have occurred on timeline