@MerlinsLostMarbles you don't think cis is offensive and you also think that cis has been used just for without causing a problem until recently.
Hate to break it to you, but I find the term hugely offensive and have since it first appeared on my radar some years ago (6? 7?) Gender is a sexist social construct and I don't share your belief in gender ideology. Calling me a 'cis woman' puts me into a subset of my own bloody sex which I don't accept exists. I am a woman. A transwoman is not a woman in the same way. I've been at the recieving end of misogyny more times than I can remember, since I was a little girl. I've gone through female puberty, the pain, mess and annoyance of menstruation, and then pregnancy, childbirth, lactation, gynae issues. I've had the indignity of smear tests and had my boobs crushed in the mammogram machine. I've worried about the risks of sexual assault, while knowing that I will likely be much weaker than my assailant. I've felt actual fear of the possibility of sexual assault. I have been sexually assaulted several times. I know that I am significantly physically weaker than virtually all the men I meet, and this has coloured how I behave since puberty.
Now, whatever hassle and strife a transwoman goes through, it's not those hassles. Those hassles are women's hassles.
WOMEN'S
We need and deserve a word to describe ourselves. We have a word. It doesn't need a prefix dragged across from chemistry.
I find cis offensive not because I hate transpeople (I know and like several) or don't think they exist, but because I really, really object to the colonisation of female culture and female reality by men who will never share or properly understand what it is to grow up female, to be a woman with all that history. Talking about misogyny, when I type woman I get this bloody icon: 👠 That's what women are reduced to? That's what we are? High heels that make our arses stick out, make us sway alluringly as we walk, bugger up our feet and backs and stop us running? I've never worn a sodding stiletto in my life, never mind a red one. See what I mean about sexist social constructs?
So, please, go away and have a think about what I've said.
<Breathes>