feminization ()
Where a male-bodied character is changed to become more stereotypically "feminine", in behavior, appearance, or body. Frequently involves gender transformation, but not necessarily - it might just involve an ordinary male character being transformed into a girly one, or there might be no transformation at all and a character could be forced to crossdress. Mind control, brainwashing, and domination are frequently involved.
As with gender transformation, if the feminization process is not shown, it must at least be strongly implied by the circumstances of the picture - for instance, see post #1719191, where a flustered-looking submissive,girly male in feminine clothing is being put in bondage next to a shelf containing what appear to be clothes along with various sex toys and bondage implements.
When a female-bodied character is made even more stereotypically feminine, this is sometimes referred to as bimbofication.