I am serious. Maybe there is something lost in translation. My dictionary gives me:
disposition <n>, nature <n>, nature <n> of a person, nature <n> of a thing, temper <n>, mettle sb. is made of <n> [archaic], natural <adj>, quiddity <n>, particular nature <n> (of a matter), essence <n>, suchness <n>
The examples make me think, that English indeed does have this meaning of the word "nature", and it's only you who doesn't know this, but maybe you would prefer a different word?
Thanks for my daily laugh from the internet. For a while I thought you were serious. But this is comedic gold.