Existential
来自Big Physics
late 17th century: from late Latin existentialis, from existentia (see existence).
wiktionary
Late Latin existentialis, from existentia. [1] [2]
etymonline
existential (adj.)
1690s, "pertaining to existence," from Late Latin existentialis/exsistentialis, from existentia/exsistentia (see existence). As a term in logic, "expressing or stating the fact of existence," from 1819; in philosophy, from 1937, tracing back to the Danish works of Kierkegaard (see existentialism). Related: Existentially.