Englishfor English speakers
back
Preposition
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Toward the rear.
He went back behind the stands.
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To a place again.
I didn't like it, so I sent it back.
He went back to the same house.
They came back again.
back
Noun
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The back is the rear part of something; it is the part in the other direction from the front.
I went to the back of the house.
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The back is the rear part of the human body.
He had a scar on his back.
back
Verb
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If you back something, you support it.
The Republicans backed the bill.
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If you back up, you move backward.
He put the car in gear and backed right into the garage door.
tunneling
noun
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The act of burrowing a tunnel.
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The practice of exploring tunnel.
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(physics) The quantum mechanical passing of a particle through an energy barrier.
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(finance) A type of fraud where assets and profits are transferred out of firms for the benefit of those who control them.
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quantum mechanical passing of a particle