Of a person, taking their work seriously and doing it well and rapidly.(adjective)
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Use "hardworking" in a sentence
"While Hillary likes to break people into groups by sex and racial prejudice, ( "hardworking" is not limited to the hills of Kentucky and West Virginia) the fear group is composed of those who, for lack of thought or lack of care, don't know what change might mean."
"Everybody knows that Obama was exceptionally bright and hardworking from a young age."
"The media keeps asking the wrong question: Obama can't close in hardworking, white states."