The term waste implies things which have been used inefficiently or inappropriately.

For example, washing-machines enable individual households to have their washing done more quickly, but they are used inefficiently.

However, much of the estate has been used inefficiently and is now outdated for a modern office space.

Investing in inefficiently used or undervalued assets with good growth potential.

Yet much of this water is used inefficiently.

Tax would then have caused the world's productive assets to be used inefficiently.

Skips are often used inefficiently and emptied when only partially full.

So people looked at these systems and saw that they were still being very inefficiently used.

As a consequence, the huge advantage offered by the socialist economic system, primarily its planned character, was used inefficiently.

Several days of the journey is inefficiently used at borders.