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erstwhile vs erst

erst vs erstwhile

erstwhile is an adjective but erst is not an adjective.

erstwhile and erst both are adverbs.

Word NounAdjectiveVerbAdverb
erstwhile No Yes No Yes
erst No No No Yes
As adverbs, erstwhile and erst are synonyms defined as:
  • erstwhile and erst: at a previous time
Other synonyms of erstwhile include at one time, formerly, once.
erstwhile (adjective) erst (adjective)
belonging to some prior time
erstwhile (adverb) erst (adverb)
at a previous time at a previous time
Difference between erstwhile and erst

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