An Etymological Dictionary of the German Language/dein
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dein, pronom. adj., ‘thy,’ from the equiv. MidHG. and OHG. dîn, corresponds to Goth. þeins, AS. þîn, E. thy, thine; related to du.
dein, pronom. adj., ‘thy,’ from the equiv. MidHG. and OHG. dîn, corresponds to Goth. þeins, AS. þîn, E. thy, thine; related to du.