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arduous
'arduous' - used as an adjective
1. characterized by toilsome effort to the point of exhaustion; especially physical effort
worked their arduous way up the mining valley
2. taxing to the utmost; testing powers of endurance
your willingness after these six arduous days to remain here
3. difficult to accomplish; demanding considerable mental effort and skill
the arduous work of preparing a dictionary
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Who Said that ?
In science, "fact" can only mean "confirmed to such a degree that it would be perverse to withhold provisional assent." I suppose that apples might start to rise tomorrow, but the possibility does not merit equal time in physics classrooms. - Click here to find out.
Fact of the day
Approximately 125 people die in the United States from an anaphylaxis to foods each year.