Transharmful is one that is... a little hard to explain? Essentially part of my brain feels that even though it goes against my own morals I SHOULD be a specific harmful thing (mostly for me because I was like that in my exomemories and there's a big uncomfortable disconnect).
Personally I, and every other transharmful person I've met, do not actually want to harm others but instead want a term and community who can understand the disconnect and distress that can come from something like that.