I tried to speak, and the words became an indefinitely repeated echo.

The effect can be repeated indefinitely, but is destroyed by heating.

And the tragedy might have been repeated indefinitely, but for certain changes that took place in humanity.

This process will repeat indefinitely until the supply is switched off.

A cyclic process is one which can be repeated indefinitely often and still eventually leave the system in its original state.

This is repeated indefinitely until someone makes a mistake and goes to Dogbox.

A good example of wrapping is wallpaper, a single pattern repeated indefinitely over a wall.

This process can be repeated more or less indefinitely, and so it is impossible to answer the original question straightforwardly.

This extension can be repeated indefinitely, to give arbitrarily large structures.

Pieces designed to repeat indefinitely, rather than having an arranged ending or fading out.