waste
This word carries a heavy sense of regret or condemnation. It describes a failure to realize the potential value of a resource, whether that resource is a physical object, a period of time, or a human talent. When applied to people, it suggests a tragic loss of capability or a ruined life. In environmental contexts, the word shifts from a moral judgment of inefficiency to a technical description of refuse. While a waste of money is a mistake, industrial waste is a pollutant. This duality makes the word equally applicable to a messy bedroom and a global climate crisis.
Countable when referring to a specific instance of inefficiency (a waste of money). Uncountable when referring to discarded materials or garbage (industrial waste).
Meanings
To use or spend something carelessly or extravagantly.
"He wasted all his money on lottery tickets."
To be spent or used in a useless or unproductive way.
"The afternoon was wasted in endless meetings."
Material that is discarded as useless or unwanted.
"The factory produces a huge amount of toxic waste."
An act or instance of using something inefficiently.
"It is a waste of time to argue with him."
Examples
She wasted her entire inheritance on luxury cars.
The whole morning wasted away in tedious bureaucracy.
The city struggles to manage its industrial waste.
Buying a ticket for a show you hate is a waste.
Phrasal Verbs
waste away
to become progressively thinner or weaker, usually due to illness or hunger
The patient continued to waste away despite the medical treatment.