(to cause of a statement etc) to become clear or intelligible

explain, make clear

to make clear, explain, (a problem, difficulty)

explain in detail

to give the meaning of (something)

make clear; give a reason for

to add pictures, diagrams, photographs etc to (something); to explain (something) by using examples etc

demonstrate, exemplify

to allow or cause (something) to be seen; to make something known

disclose, tell

to make (something) easy to do or understand

make easy, intelligible