Conserved

He conserved his energy for the next game.

Wise and prudent men — intelligent conservatives — have long known that in a changing world worthy institutions can be conserved only by adjusting them to the changing time.

What I’m getting at is that Zamenhof not only built a linguistic object, but that behind that was an idea — an idea of brotherhood, a pacifist idea. That strength of an ideal — for which Esperantists were even persecuted under Nazism and Stalinism — is still conserved by the community of Esperantists. One cannot say that it has failed, but one thing needs to be said: the reason why any language is successful is always indefinable.

A closed system is a thermodynamic system in which mass is conserved within the system, but energy can freely enter or exit.

Sinograms have been conserved because of the large number of homonyms in their languages.

Carefully conserved though that oxygen is, no process is or can be one hundred per cent efficient. There will be leakage into space, and that which is lost must be replaced. To bring oxygen from Earth in liquid form would be outrageously expensive and even more outrageously inefficient—and no other planet in the System has free oxygen for the taking.

This hybrid automobile saves a lot of money from conserved gasoline.