erstwhile
🇺🇸
/ˈɜːrstwaɪl/
🇬🇧
/ˈɜːstwaɪl/
used to describe something or someone that was such in the past but not anymore
She bumped into her erstwhile partner at the cafe.
그녀는 카페에서 예전 파트너를 우연히 만났다.