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thrice (adv.)
[thrice 词源字典]
c. 1200, from Old English
þriga
,
þriwa
"thrice" (from
þrie
"three;" see
three
) + adverbial genitive
-es
, changed c. 1600 to
-ce
to reflect voiceless pronunciation.
[thrice etymology, thrice origin, 英语词源]
[thrice 词源字典]