extant
/ekˈstænt/adjective
- (especially of a document) still in existence; surviving（尤指文件）尚存的, 现存的：
an extant letter.
尚未丢失的信。
词源
mid 16th cent. （in the sense 'accessible, able to be publicly seen or reached'）： from Latin exstant- 'being visible or prominent, existing', from the verb exstare, from ex- 'out'+stare 'to stand'.