"clench" is a correct and usable word in written English.
You can use it as a verb to describe the act of tightly clenching something with your hand, for example: "I clench my fist in frustration".
Standing under what looks like the Barbican's Rain Room installation, balletic dancers clench and unravel behind her as she kicks down the top notes with complete authority, black ink trailing down her arms.
He may not be able to clench a bayonet between his teeth, but he certainly knows a few men who can.
But sometimes on the television he would glimpse the flickering figure of a bearded old man his own age; and Mr Chanes de Armas would clench his fist and cry "Carajo!", his own obscene revolutionary salute.
This action was to clench either their right or their left hand into a fist.
Replacing fMRI with a slightly less accurate technique called near-infra-red spectroscopy produced two further successful trials involving a different volunteer.Both techniques were able to see the brain acting to clench a volunteer's fist in his dream in exactly the way that it does when ordering fist-clenching in reality.
Last week the White House press secretary said that thinking about the oil spill made the president clench his jaw.
Sadly, the country's leadership has treated them the way most people do a trip to the dentist: they know they should open wide, but at the first hint of discomfort, instinct makes them clench hard.
He also insists that his supporters in local government must clench their teeth and obey the law and has produced 16 PP mayors who say they are willing to do so.
But some of even JBIC's functions, such as export financing, might be usefully spun off.Investors' knuckles will no doubt clench whiter over the next couple of weeks, as the vote on Japan Post approaches.
The physician examines motor functions of the trigeminal nerve by asking the patient to clench the teeth and by tapping the patient's chin to test the jaw reflex.
With diplomacy exhausted, harsher measures are called for.America, Britain, France, Germany, Russia and China, the six countries trying for four years to talk round Iran's clench-fisted regime, had agreed to give it a last chance, until the end of this year, to show diplomatic willing.
