TN Lev18:13 :עריתה דאחתה"דחתא" דאמך לא תבזי‏ : you should not uncover the nakedness of your maternal aunt
See the entire entry for (ˀ)ḥā/(ˀ)ḥāṯ, (ˀ)ḥāṯā n.f. sister