double up

1. (transitive)To double the quantity, amount or duration of something

   I'm going to double up my enlistment.

2. (broadly, intransitive)To double one's amount of chips by winning an all-in pot.

3. (intransitive)To bend, bend over; to fold; to stoop.

   Near-synonym: double over

   bend over or curl up, usually with laughter or pain

4. (transitive)To cause (someone) to bend over; to beat up (someone).

   I doubled him up with a swift punch to the stomach.

5. (intransitive)To have a secondary use.

   This unfolding sofa doubles up as a bed.

6. (transitive)To get the second out in a double play, typically referring to getting an out by beating a runner back to a base (often by throwing) after a fly ball has been caught

   Jones snared the liner and then stepped on the bag to double up the runner.

7. (intransitive)To employ double the usual resources for a particular purpose; to work in pairs.

8. (intransitive, slang)To marry or live with someone; to share a living space.

1. I doubled up with a stranger that night.

   deIn jener Nacht teilte ich das Zimmer mit einem Fremden.

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2. The cashier usually doubles up the paper bags, since they rip easily.

   deDie Kassiererin steckt gewöhnlich zwei Papiertüten ineinander, da sie leicht reißen.

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3. Tom doubled up with pain.

   deTom krümmte sich vor Schmerzen.

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irregular

• double upподвоїти, подвоюватиTo double the quantity, amount or duration of something
• double overподвоїти, подвоюватиTo bend over deeply at the waist.
• double offAfter a fly ball is caught, to tag the base (a runner) was on at the time of the pitch, thereby causing them to be out for failure to tag up.
• double downTo double one's wager, particularly, the name of a specific doubling bet allowed in blackjack.
• double backTo retrace one's steps; to go back where one has already gone.