Definition: establish as valid or genuine
Usage: Can you back up your claims?
Similar words: affirm, substantiate, support, sustain, corroborate, confirm
Definition: establish or strengthen as with new evidence or facts
Usage: his story confirmed my doubts; The evidence supports the defendant
Synonyms: clog, clog up, choke, choke off, congest, foul, back up
Definition: become or cause to become obstructed
Usage: The leaves clog our drains in the Fall; The water pipe is backed up
Similar words: jam, close up, block, impede, obstruct, obturate, occlude
Definition: block passage through
Usage: obstruct the path
Synonyms: back up
Definition: make a copy of (a computer file) especially for storage in another place as a security copy
Usage: You'd better back up these files!
Similar words: re-create, copy
Definition: make a replica of
Usage: copy that drawing; re-create a picture by Rembrandt
Synonyms: back down, back off, back up
Definition: move backwards from a certain position
Usage: The bully had to back down
Similar words: retire, retreat, pull away, pull back, recede, withdraw, draw back, move back
Definition: pull back or move away or backward
Usage: The enemy withdrew; The limo pulled away from the curb