erst·while /ˈɝstˌ(h)waɪl/
(ad.)以前,往昔地(a.)以前的,往昔的
Erst·while adv. Till then or now; heretofore; formerly. [Archaic]
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erstwhile
adj : belonging to some prior time; "erstwhile friend"; "our
former glory"; "the once capital of the state"; "her
quondam lover" [syn: erstwhile(a), former(a), once(a),
onetime(a), quondam(a), sometime(a)]
adv : at a previous time; "once he loved her"; "her erstwhile
writing" [syn: once, formerly, at one time, erst]