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-teenth
[-teenth 词源字典]
word-forming element making ordinal numbers from 13 to 19, from
-teen
+
-th
(1), displacing Old English
-teoða
,
-teoðe
(West Saxon), related to
teogoða
(Anglian) "tenth."
[-teenth etymology, -teenth origin, 英语词源]