demasculinize

verb (used with object), mas·cu·lin·ized, mas·cu·lin·iz·ing.

1. Medicine/Medical. to produce certain male secondary sex characteristics in (a female).
2. to make masculine in character, quality, or appearance: The presence of two large leather sofas seemed to masculinize the whole room.

verb

1. to make or become masculine, esp to cause (a woman) to show male secondary sexual characteristics as a result of taking steroids

v.

1. To give a masculine appearance or character to.
2. To cause a female to assume masculine characteristics, as through hormonal imbalance.