Third-person singular simple present indicative form of flesh.(verb)
Wiktionary.org : Text is available under the Creative Commons Attribution-ShareAlike License
Use "fleshes" in a sentence
"Each title fleshes out more of Snake's history and that of a clandestine organization known as "the Patriots.""
"It fleshes out US military allegations of Iranian intervention more than reports of killings by American soldiers, an emphasis that conveniently contributes to the demonization of Iran by American politicians."
"I know a lot of bands have one guy who really fleshes out the song and then brings this thing to present to the band."