kiwen

kiwen are things whose form resists changing. This often talks about a hard physical material or object, like a rock or wood or crystal. It can describe something's material, so a chair made out of a hard material could be kiwen. It is additionally possible to talk about nonphysical things using kiwen, but it's imperative to explain your metaphor clearly. Ask two toki ponists about what kiwen means metaphysically and you'll get three answers. None of them are universally intuitive. Without this extra expansion, I recommend avoiding using kiwen to talk about non-physical things.