An embedded reporter or journalist, such as a war reporter assigned to and travelling with a military unit, or a political reporter assigned to follow and report on the campaign of a candidate.
"The network decided to embed a seasoned war correspondent directly with the battalion so he could document their daily operations firsthand."
attach to, as a journalist to a military unit when reporting on a war
"The young reporter was embedded with the Third Division"
To lay as in a bed; to lay in surrounding matter; to bed.
"The ancient builders embedded the massive stone pillars deep within layers of packed earth and sand before constructing the temple walls around them."