Thine
来自Big Physics
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Old English thīn, of Germanic origin; related to German dein, also to thou1.
wiktionary
From Middle English thyn, þyn, from Old English þīn, from Proto-West Germanic *þīn, from Proto-Germanic *þīnaz. Cognate to German dein, Danish, Swedish and Norwegian din, Faroese tín and Icelandic þinn.
etymonline
thine (pron.)
Old English þin, possessive pronoun (originally genitive of þu "thou"), from Proto-Germanic *thinaz (source also of Old Frisian, Old Saxon thin, Middle Dutch dijn, Old High German din, German dein, Old Norse þin), from PIE *t(w)eino-, suffixed form of second person singular pronominal base *tu-. A brief history of the second person pronoun in English can be found here; see also thou.
