adjective former or previous
adverb formerly or previously
Erstwhile political parties may resurface under new names or ideologies in different eras.
Erstwhile characters in classic novels often serve as a contrast to the present circumstances of the story.
Erstwhile rulers of ancient civilizations are studied to understand the political structures of the past.
Erstwhile laws that have been repealed or amended can provide insights into the evolution of legal systems.
In the literary world, 'erstwhile' is often used to describe a former or previous state of being or existence. For example, a writer may refer to an 'erstwhile collaborator' or an 'erstwhile bestseller.'
Psychologists may use 'erstwhile' to describe a previous behavior or state of mind in a clinical setting. For instance, they may refer to an 'erstwhile phobia' or an 'erstwhile coping mechanism.'
Historians may use 'erstwhile' to describe a past era or time period in their research and writing. They may refer to an 'erstwhile empire' or an 'erstwhile tradition.'
Lawyers may use 'erstwhile' to refer to a previous legal status or situation in their arguments or case studies. For example, they may mention an 'erstwhile defendant' or an 'erstwhile law.'
In the business world, 'erstwhile' can be used to describe a former business partner, strategy, or trend. Business analysts may mention an 'erstwhile competitor' or an 'erstwhile market leader.'