root out• It might be impossible to root them out.• It was time, as a city documentary of the period declared, to root the cancer out.• Many gardeners find it hard to rip out a perennialflower that has taken root.• This is to stop the roots drying out.• It would have taken a battalion to root the fanatics out, and the casualties would have been horrendous.• There are those who root for teams out of sheerlove of sport, and those who play just for fun.• Where the roots stick out the bank gives way to a hollow where the buffaloes are tethered during the day.• Comb from tip to root, working out the knots at the end before moving up the hair.