transsexualize

verb2

1. •
   To make transsexual.

   • […] which he liked to compare to an archduchess's urine, fetishizing it as a kind of elixir of femaleness by which he can transsexualize himself […] — 1996
2. •
   To cause (something such as an anthropomorphized natural phenomenon, like a flood) to have the opposite sex or gender.