explain (to make something easy to understand by describing it): Let me explain the situation to you.
clarify formal (to make something clear or easy to understand): His explanation did not clarify some points.
elucidate formal (to make something that is difficult clear or easy to understand): I don’t understand this; could you please elucidate?
shed light on something (to make something easier to understand): The researchers have shed light on the causes of the disease.
spell something out informal (to explain something explain in very simple words): We have to spell everything out for him.
illustrate (to clarify by use of examples, charts, pictures, etc.): Let me give a few examples to illustrate what I mean.
interpret (to explain the meaning of words or actions): Please interpret the result for me.
expound (to explain something in detail): You will have the chance to expound your theory.