"Inertial confinement" is the technique of obtaining the fusion reaction conditions of temperature and density and duration by a process that occurs so fast, the reaction constituents are "inertially confined" by the inertia resistance of their own mass (instead of by difficult to produce and control electromagnetic fields). This was a technique somewhat employed by the implosion design for nuclear weapons.

"Net energy" means that the energy left over from the reaction less all the energy required by the process is a positive value. Up to this point, it took more energy to create the process than the process would produce (net energy loss).

There is no "codespeak." There is just the common lingo of the fusion physics field, known for half a century by anyone who has studied it.