expound vs clarify

expound and clarify both are verbs.

Word	Noun	Adjective	Verb	Adverb
expound	No	No	Yes	No
clarify	No	No	Yes	No

As verbs, clarify is a hypernym of expound; that is, clarify is a word with a broader meaning than expound:

expound: add details, as to an account or idea; clarify the meaning of and discourse in a learned way, usually in writing
clarify: make clear and (more) comprehensible

Other hypernyms of expound include clear up, elucidate.

expound (verb)	clarify (verb)
add details, as to an account or idea; clarify the meaning of and discourse in a learned way, usually in writing	make clear by removing impurities or solids, as by heating
state	make clear and (more) comprehensible