Lutetium, a chemical element with the symbol Lu, is classified as a rare earth metal and is relatively hard compared to many other metals. It has a hardness similar to that of titanium, making it more challenging to work with than softer metals like aluminum or copper. However, it is not the hardest of metals; for instance, tungsten and chromium are significantly harder. Overall, lutetium's hardness contributes to its utility in various high-temperature and high-strength applications.
Lutemium
Very hard.
Very hard.
as hard as, so hard as, less hard as, more hard as, hard, harder, the hardest.
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The word 'hard' is an adjective (a hard floor, hard water) or an adverb (push hard, work hard), but not a noun.The noun form of the adjective 'hard' is hardness.
As hard as nails (usually about a person) As hard as diamond As hard as rock
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Hard bound
Work hard.
hard hard
hard working