hinter.

From Middle High German hinder, from Old High German hintar, from Proto-Germanic *hinder. As to the variation between ⟨nd⟩ and ⟨nt⟩: In Upper German texts, West Germanic *nd regularly surfaces as Old High German ⟨nt⟩, but Middle High German ⟨nd⟩ (alongside rare ⟨nt⟩ spellings). In the sequence ⟨nder⟩, however, modern German sporadically switches back to ⟨nter⟩. Compare hinter, unter (whence by analogy hinten, unten), munter, Sinter. The word Winter, which has unshifted West Germanic *nt, generally retained ⟨nt⟩ throughout (though seldom also Middle High German winder).

From Middle High German hinder, from Old High German hintar, from Proto-Germanic *hinder. As to the variation between ⟨nd⟩ and ⟨nt⟩: In Upper German texts, West Germanic *nd regularly surfaces as Old High German ⟨nt⟩, but Middle High German ⟨nd⟩ (alongside rare ⟨nt⟩ spellings). In the sequence ⟨nder⟩, however, modern German sporadically switches back to ⟨nter⟩. Compare hinter, unter (whence by analogy hinten, unten), munter, Sinter. The word Winter, which has unshifted West Germanic *nt, generally retained ⟨nt⟩ throughout (though seldom also Middle High German winder).