Synonyms/Hypernyms (Ordered by Estimated Frequency) of verb back_up

5 senses of back up

Sense 1
support, back up -- (give moral or psychological support, aid, or courage to; "She supported him during the illness"; "Her children always backed her up")

Sense 2
back up, back off, back down -- (move backwards from a certain position; "The bully had to back down")
       => withdraw, retreat, pull away, draw back, recede, pull back, retire, move back -- (pull back or move away or backward; "The enemy withdrew"; "The limo pulled away from the curb")

Sense 3
back, back up -- (establish as valid or genuine; "Can you back up your claims?")
       => confirm, corroborate, sustain, substantiate, support, affirm -- (establish or strengthen as with new evidence or facts; "his story confirmed my doubts"; "The evidence supports the defendant")

Sense 4
back up -- (make a copy of (a computer file) especially for storage in another place as a security copy; "You'd better back up these files!")
       => copy, re-create -- (make a replica of; "copy that drawing"; "re-create a picture by Rembrandt")

Sense 5
clog, choke off, clog up, back up, congest, choke, foul -- (become or cause to become obstructed; "The leaves clog our drains in the Fall"; "The water pipe is backed up")
       => obstruct, obturate, impede, occlude, jam, block, close up -- (block passage through; "obstruct the path")