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to back up
[phrase form: back]
01
to support someone or something
Transitive: to back up sb/sth
02
to walk backward from a particular spot
Intransitive
03
to confirm that something is true or valid
Transitive: to back up a claim or statement
04
to wait in a long line of cars, unable to move because the road is crowded
Intransitive
05
to make a copy of computer digital data
Transitive: to back up digital data
06
(of a vehicle) to move backward
Intransitive
07
to reverse or undo one's actions or decisions
Intransitive
08
to reconsider or rethink one's previous thoughts or decisions
Intransitive
back up
v
Example
The loyal fans always back up their favorite sports team.
The coach consistently backs up his players, fostering team spirit.
I'll back up your proposal during the meeting.
The system automatically backs up the data every night.
The witness backed up the testimony with clear recollections.
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