הֶ֫פֶךְ

Ezekiel 16:34 הֵ֤פֶךְ לְהֶֽפֶךְ׃ contrariness, <into> contrariness

So your prostitution is the opposite of that of other women: No one solicited your favors, and you paid a fee instead of receiving one; so you are the very opposite!