erstwhile

(s) belonging to some prior time
- erstwhile friend
- our former glory
- the once capital of the state
- her quondam lover
onetime, one-time, quondam, sometime, former, old,
(r) at a previous time
- at one time he loved her
- her erstwhile writing
- she was a dancer once";
erst, formerly, at one time, once,

onetime one-time quondam sometime former old erst formerly at one time once