archaic, literary
: before this time : heretofore
… Arboriculture would indeed have been improved, under such an instructor. His excellent example would long erenow have rendered both science and information indispensable to our profession.—Sir Henry Steuart
"His vengeance may be delayed for a time, but not forever," she answered … . "You say true, lovely Ellen; and I have done enough, erenow, to insure its heaviest weight. …"—Nathaniel Hawthorne
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Merriam-Webster unabridged
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