I am going to give an analogy here for the Trinity. Almost always these types of things are actually the modalism heresy. Like the water being liquid, solid, gas is actually modalism. It is modalism because it is one thing taking 3 forms, and each of the three states is not fully the water in every way. This is not the right understanding of the trinity. The trinity rightly understood is one God having 3 persons, all equally God and fully God, yet distinct from each other.
However this is maybe the closest analogy I have come across using human terms.
Image a dry erase board. You grab three dry erase pens of Red, Green, and blue. Now you perfect draw a red circle on top of a green circle, on top of a blue circle. Now you have all three colors making one perfect circle, however the red circle is not the green or blue circle, the green circle is not the red or blue circle, and the blue circle is not the red or green circle. However, each individual colored circle is perfectly the circle. The red circle is the circle, the green is the circle, and the blue is the circle. Also too all three together are the circle
Obviously there are some problems , like wouldn’t the colors mix? But this is the closest analogy to the trinity I have found using material ideas.
