It's often found in words related to movement, transportation, or carrying things. For example:
* Photophore: A light-producing organ in some animals, literally "light-bearer".
* Diaphoresis: Excessive sweating, literally "carrying through".
* Euphoria: A feeling of intense happiness and well-being, literally "carrying well".
* Phosphorous: A chemical element that glows in the dark, literally "light-bearing".
* Defer: To postpone or delay, literally "to carry away".
* Morphology: The study of the forms of things, literally "shape-bearing".
So, whenever you see "phor" in a word, remember that it's about carrying, bearing, or moving something.