(~s)
1.
A ~ is a big gun which fires missiles high into the air over a short distance.
He was killed in a ~ attack.
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2.
Mortar is a mixture of sand, water, and cement or lime which is put between bricks to hold them together.
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3.
A ~ is a bowl in which you can crush things such as herbs, spices, or grain using a rod called a pestle.
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4.
bricks and ~: see brick