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valedictory (adj.)
[valedictory 词源字典]
1650s, "pertaining or relating to leave-taking," from Latin
valedictum
(past participle of
valedicere
; see
valediction
) +
-ory
. As a noun meaning "valedictory address" from 1779.
[valedictory etymology, valedictory origin, 英语词源]