erstwhile

adv

1. (formal, literary, not-comparable)Formerly; in the past.

adj

1. (India, literary, not-comparable)Former, previous.

   ““Scarcely had Alice reached her twentieth birthday, than she gave her erstwhile fiancée^([sic]) his formal congé.[…]””

   “As an aftermath of the erstwhile competition between companies, 41 goods depots served the Liverpool and Birkenhead docks in 1923.”

   “Other erstwhile stalwarts are also wavering. Southampton had two of the best full-backs in the league last season but Ryan Bertrand has been below par this season and Cédric Soares made an uncharacteristic lapse that led to Stoke’s winning goal in Southampton’s last outing.”

2. (not-comparable, proscribed)Respected, honourable.

   “If you're for one of my erstwhile opponents, that's O.K. Just don't work too hard.”