Simple.
You cannot find the word there (or many of the comical variations such as: a Triune Godhead, the Triunity, Co-Equal God Beings, Godhead, a Hypostaic Union, Divine essences, Divine Natures, a God-the-Son, a God-the-GHOST, Hypostasis, Homoousios, Perichoresis , a Godman, Omnipresence, Incarnation, a God who is a Sacred Mystery, a God 'in three persons', Dual natures, a reincarnate God, a first person of the trinity, a second person of the trinity, a third person of the trinity, Godness, a Tri-Unity or a multipersonal God), or any of the so-mentioned aspects.
Jehovah identified Himself (not 'Themselves") as on One God, as did Jesus and all the prophets.
So, come, let us know of the simple twists of the Clergy!