A nightmare is a bad dream. Nightmares can be extremely frightening, and make you wake up scared.
You might also use nightmare to describe a particularly bad event, for example "we had a nightmare vacation".
A pair of things is two things. You usually use the word pair to describe two very similar things, like a pair of birds. Some things only come in pairs - like a pair of glasses or a pair of trousers. Many other things usually come in pairs but can be separated, like a pair of socks, shoes or gloves.
Scientific name: pyrus communis
The pear is the fruit of the pear tree. Pear trees are small deciduous trees growing to around 5-12 metres high. Pears may be green or yellow. Pears are closely related to apples but are softer, juicier and a different shape. You can eat all of the pear except the core in the middle, which is full of seeds.
Pierre is the capital of the state of South Dakota in the United States of America. The population of Pierre is around 13,500.
Pis forPolar bear
Scientific name: ursus maritimus
Polar bears live in the cold areas in the northern part of the world. They are white to camouflage with the snow. They have very thick fur and a thick layer of fat to keep them warm. They are excellent swimmers, and eat mainly fish and seals.
Pis forPrickly pear
Scientific name: opuntia stricta
Ris forRare (cooked)
Meat is cooked rare if it is only cooked very lightly, and it is still pink in the middle.
