If there are no extraneous forces, the resultant linear momentum is constant in every respect.
Partaking human food is now extraneous, yet can still be quite enjoyable.
The musical growth is spoilt, the development of the themes is stopped, or prevented, by some reference to extraneous ideas.
It is probable also that the " extraneous discourses " (Oi i wTEpLKoi Aoyoc) sometimes mentioned in them here mean dialectical discussions of a subject from opinions extraneous to its nature, as opposed to scientific deduction from its appropriate principles.
Pierre now recognized in his friend a need with which he was only too familiar, to get excited and to have arguments about extraneous matters in order to stifle thoughts that were too oppressive and too intimate.