Bare bones
"Bare bones" in a Sentence (3 examples)
He had only been taught the bare bones of the system, but carried on regardless.
The bare bones of a cookbook are its recipes, but as a genre it is so elastic and malleable that it can contain a range of other purposes and dimensions.
Typically, this meant that the teams were turning around two sets a week, with a train rolling into the depot on a Sunday for what Hinze describes as a "big strip-out". This would pull the carriages back almost to the bare bones.