
Erstwhile
Time Shift
Indicates a shift in time to express that someone or something was, but is no longer, in a specific role or state.

His erstwhile mentor retired last spring.
Emotional Distance
Implies a psychological or emotional separation from something or someone in the past.

She returned to her erstwhile home, feeling like a stranger.
Narrative Change
Useful in storytelling to introduce a change in a character's life or situation.

The erstwhile villain redeemed himself in the story's climax.
Compare with
ExFormerOldOncePastPreviousPriorSometime
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