flesh out

(verb) make fat or plump. Synonyms: fatten, fat, flesh out, fill out, plump, plump out, fatten out, fatten up. Example: "We will plump out that poor starving child."

(verb) add details, as to an account or idea; clarify the meaning of and discourse in a learned way, usually in writing. Synonyms: elaborate, lucubrate, expatiate, exposit, enlarge, flesh out, expand, expound, dilate. Example: "She elaborated on the main ideas in her dissertation."

(verb) become round, plump, or shapely. Synonyms: round, flesh out, fill out. Example: "The young woman is fleshing out."