When they are very, very small, materials, such as copper, that are soft can become hard.
Either way, says Mr Kfouri, the momentum for a clean-up may have become hard to stop.
Too often managers feel hamstrung by the talents of superstar employees, especially when those employees become hard to handle.
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Supporting Lords reform in principle but holding it up in practice might become hard for Ed Miliband, the Labour leader, to explain.
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Human saliva is what softens Revolymer gum, so when the gum dries out--if it works as planned--it should become hard and therefore be easier to remove.
At the same time, Fitch struggled on his knees as he was forced to use both hands to muscle the plane's throttle levers, which also had become hard to move.
Squaring that with the political demands of Mr Vasquez's clientelist machine may become increasingly hard.
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But the idea that Britain has the best television in the world has become increasingly hard to sustain.
The actuarial calculus built around that population has become increasingly hard to mask.
However, quantum manipulations involving any more than a tiny number of particles together quickly become too hard to do.
When their parents die, families disintegrate and meeting basic needs such as food, shelter, clothing, and education become extremely hard.
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If they become too hard, you can back up to catch up.
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Cooking oil, sugar and Zimbabweans' staple maize porridge have become very hard to come by in Harare, harder still in the countryside.
The truth is, there's tons of great content on live TV and via streaming services, but it's just become too hard to find.
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With all the heartening co-operation in government it has become increasingly hard in the past year to distinguish the Lib Dems from Labour.
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The former California governor had become somewhat hard of hearing, so Casey made it a point to seat himself next to the future president.
Second, public drinking water fountains have become increasingly hard to find.
The cultural protection media firms have enjoyed is unlikely to last, because it will become increasingly hard for politicians to control the way that film is delivered into people's living rooms.
In a previous article, I looked at marketing innovators who are creating engaging brand experiences putting into practice the first of four marketing principles that together build the kind of long-term customer loyalty that has become increasingly hard to achieve.
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Once you consider the enormity of this - a situation that many in modern politics, finance and economics might regard as the definition of "unfreedom", you understand why it has become so hard for Barroso, Merkel et al to formulate a plan.
How heavily do you want to see America involved in an emissions trading scheme globally, or has this become too politically hard for you?
"Whether they have really changed to become frugal is hard to say, but on the surface, they still have to do it, " Wu said.
This past week we found out that 100, 000 commodities traders did not know what had become of their hard-earned money left in segregated customers accounts at MF Global, a commodities dealing house now bankrupt.
Among politicians who don't end up in jail, some try hard to become elected officials again.
Back in Cairo, Nageh's older son, Mohamed, is studying hard to become a banker.
But, once entrenched, job-preferment policies tend to benefit the better off, become meaninglessly broad and hard to undo.
If the Katangans backed him, the province could become virtually independent and hard for the rebels to take.
"Mr. Blackwell's worked very hard to become the center of attention in Ohio, " The Plain Dealer quoted Coleman as saying.
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