The term "ordinary" generally refers to something that is common, usual, or not exceptional. In the context of the words you've provided, here are their meanings:
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Important: Something that holds significant value or is of great consequence; it matters a lot in a given context.
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Mundane: Relating to the ordinary, everyday world; often implies something that is dull or lacking excitement. It can refer to tasks or experiences that are routine and not remarkable.
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Patent: This term has a couple of meanings, but in the context of being "ordinary," it might refer to something that is evident or obvious. It can also refer to a legal grant that gives the creator exclusive rights to their invention.
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Labor Saving: Refers to tools, machines, or methods designed to reduce the amount of human labor required to complete a task. In some cases, these innovations can help make ordinary tasks more efficient.
In short, "ordinary" tends to signify things that are typical or standard, while the other terms can describe various aspects or interpretations of what is common or practical in everyday life.