erst

(ûrst)
adv. Archaic
Erstwhile.

[Middle English erest, from Old English ǣrest.]

IN BRIEF: Originally. Also: First.

The author's erstwhile writing was much better than the present day writing.

Note: click on a word meaning below to see its connections and related words.

The adverb has one meaning:

Meaning #1: at a previous time
  Synonyms: once, formerly, at one time, erstwhile

---