This one is pretty easy. Between suffixes (namespaces), roots (what a thing actually is), and suffixes and all that, I like to use a suffix (a word-final thing, something that goes at the end of the word) that denotes the type of the thing (name, variable) being used. It probably sounds more complicated than it really is so here are some clarifying examples.
The following examples are either variable names, or properties of an object, or fields of a model, or methods in a class, or keys in a hash. Hopefully you get the idea.