back sth up
— phrasal verb with back uk/bæk/us/bæk/verb
C2 to prove something is true:
His claims are backed up by recent research.
B2 to make an extra copy of computer information:
Make sure you back up your files.
See also
backup
Thesaurus: synonyms and related words
Proving and disproving
- actions speak louder than words idiom
- attest
- authenticate
- back sb up
- bear witness (to sth) idiom
- belie
- catch
- colour
- do justice to yourself idiom
- documentary
- evidence
- explode
- explosion
- proof
- stick
- supportable
- testament
- the acid test
- the burden of proof idiom
- undocumented
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You can also find related words, phrases, and synonyms in the topics:
Operating computers