Englishfor English speakers
waste
Verb
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To use something for no reason, or for bad reasons or only little reasons, and after it is used no one can use it again.
He wasted the food by making it dirty.
waste
Noun
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Things that are not useful; things that people want to take out of their house.
disposal
Noun
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Disposal is the act of getting rid of or throwing out something.
There is no long-term plan for nuclear waste disposal.
After a strange package was found, bomb disposal workers were called in.
—
If you have something at your disposal, it is available for you to use.
Some of the students seem to have a lot of money at their disposal.
system
Noun
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A group of things that work together; a way of doing something.
This coloured paper is part of my system for keeping lists of people.