The verb expatiate means "to add details to in order to clear up." If your story is confusing to everyone who hears it, certain key parts must be missing. Better expatiate so that people can understand it.

To pronounce expatiate correctly, accent the second syllable: "ex-PAY-she-ate." When you expatiate on a piece of writing, you add details. The goal is to make your ideas clearer to readers, perhaps by offering an example to help them understand. Teachers can tell when you are expatiating and when you are just adding to what you've written, say, to reach a certain length requirement. That's usually called "padding."

Definitions of expatiate

v add details, as to an account or idea; clarify the meaning of and discourse in a learned way, usually in writing

dilate, elaborate, enlarge, expand, exposit, expound, flesh out, lucubrate
abbreviate, abridge, contract, cut, foreshorten, reduce, shorten
reduce in scope while retaining essential elements
cut, edit, edit out
cut and assemble the components of
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provide details for
exposit, expound, set forth
exemplify, illustrate, instance
clarify by giving an example of
particularise, particularize, specialise, specialize, specify
be specific about
depict, describe, draw
give a description of
set forth beforehand, often as an explanation
spell out
make explicit; specify in detail
Type of:
clarify, clear up, elucidate
make clear and (more) comprehensible

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