@Darth_Algar “Psychic” ability may seem supernatural from the limited perspective of a pseudo-scientific materialist skeptical mindset.
It is telling that such a perspective is written into a modern dictionary, though mine (Oxford English Dictionary) writes something slightly different if you pay close attention to the words:
psychic [adjective]
1 relating to or denoting faculties of phenomena that are apparently inexplicable by natural laws, especially involving telepathy or clairvoyance.
>(of a person) appearing or considered to be telepathic or clairvoyant.
2 of or relating to the soul or mind.
3 Bridge [...]
psychic [noun]
1 a person considered or claiming to have psychic powers; a medium.
2 (psychics) [treated as sing. or pl.] the study of psychic phenomena
Of which I notice that:
A) You wrote “something that is beyond rational/scientific understanding” and “a word that means beyond rational”, which looks like an attempt to bend definitions to mean irrational by definition, whereas the definition I read above is “apparently inexplicable by natural laws”, which is a very different thing.
B) I also think that the first definition includes the bias of unproven pseudo-scientific bias and prejudice. The second definition seems to me much more to the point, especially because it is what the root of the word means. That is, “of or relating to the soul or mind”, since “psyche” is of course from the ancient Greek word for soul, life, or breath, and the English word “psyche” means “human soul, mind, or spirit” (which also shows a bit of the popular (but I would say, cruelly wrong-minded) modern bias towards dissociating non-humans from having souls, minds, or spirits, and which also shows the modern orientation to and identification with thought by inserting “mind”.
So actually, yes I can do use the word psychic without invoking “beyond rational”. I also know several very rational people with scientific degrees, doctorates, and so on, who base their ideas on personal experiences and on evidence and rational logic, and who write about souls, past-life regression, seemingly psychic abilities of humans and animals, mediumship, communication with ancestors and spirits and so on.