BDB2212
הֶ֫פֶךְ noun masculine the contrary, contrariness, perversity; — absolute ׳ ה Ezek 16:34 הֶ֑פֶךְ Ezek 16:34 suffix הַפְכְּכֶם Isa 29:16 (see Baer); —
1.
the contrary, opposite thing
וַיְהִיבָֿךְ הֶפֶךְ מִןהַֿנָּשִׁים
Ezek 16:34
& there hath occurred in thee the contrary from other women; Ezek 16:34
וַתְּהִי לְהֶ֑פֶךְ
so thou hast become the contrary.
2.
הַפְכְּכֶם
Isa 29:16
Oh, your perversity!