Ietsism (Dutch: Ietsisme; Dutch pronunciation: [itsˈɪsmə]) is an unspecified belief in an undetermined transcendent reality. It is a Dutch term for a range of beliefs held by people who, on the one hand, inwardly suspect – or indeed believe – that "there must be something undefined beyond the mundane and that which can be known or can be proven", but on the other hand do not accept or subscribe to an established view of the nature of a deity offered by any particular religion.