Explain

To flatten; to spread out; to unfold; to expand.

To make plain, manifest, or intelligible; to clear of obscurity; to expound; to unfold and illustrate the meaning of; as, to explain a chapter of the Bible.

To give an explanation.

serve as a reason or cause or justification of; "Your need to sleep late does not excuse your late arrival at work"; "Her recent divorce may explain her reluctance to date again"

make plain and comprehensible; "He explained the laws of physics to his students"