Later
来自Big Physics
from Greek -latrēs ‘worshipper’.
wiktionary
Cognate with Saterland Frisian leeter(“later”), West Frisian letter(“later”), Dutch later(“later”), German Low German later(“later”).
etymonline
later (adj., adv.)
"afterward," 16c., comparative of late. A modern formation; the Old English comparative lator developed into latter. As a salutation, "farewell," from 1954, U.S. colloquial, short for adverbial use in (I'll) see you later.