The word arthritis means inflammation of the joints.
We learned that the suffix -itis means "inflammation." So the word arthritis means "inflammation of the joints." Another example of arthr- is arthralgia. If I tell you that the suffix -algia means "pain," you will know that the word arthralgia simply means "pain in the joints."
The combining form neur- or neuro- means having to do with a nerve or the nerves. Some examples are:
neuron - a nerve cell
neurosis - a condition affecting the nerves (the suffix -osis means "a condition")
neuroma - a nerve tumor (the suffix -oma means "tumor")
What does the word neuralgia mean?
Pain in a nerve
Pain in a joint
Inflammation of a nerve
Pain in the neck