To put into pairs; to put into a group of two.(verb)
To get into pairs; to join together to make a group of two.(verb)
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Use "pair up" in a sentence
"Brother Urien and Brother Haluin would be the last pair up on the roof for this day."
"It would have been fun to see the Lejman sisters pull Brother Mike onto the dance floor to do the dance that starts out with everyone throwing a shoe into the center of the floor, then having to pair up with the owner of the shoe they grab out of the pile."