opening

The opening between the rocks was very narrow, but the boys managed to squeeze through.

break

In order to break the world record, Blaine had to hold his breath without fainting.

leak

Tightly sealed to prevent air leaks, the house was equipped with small double-paned windows

and several other energy-saving features.

split

His trousers split when he tried to jump over the fence.

crack

Back in the days when energy was cheap, home builders didn’t worry much about unsealed cracks.

debate

Although many experts agree that more children are overweight, there is debate over the best

ways to tackle the problem.

portion

When you raise the price of a product, you're

likely to lose a portion of your customer base.