back up

verbs

give moral or psychological support, aid, or courage to
"She supported him during the illness"; "Her children always backed her up"
back up, support
is derived from
backup
move backwards from a certain position
"The bully had to back down"
back down, back off, back up
establish as valid or genuine
"Can you back up your claims?"
back, 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!"
back up
is derived from
backup
domain category
a machine for performing calculations automatically
computer, computing device, computing machine, data processor, electronic computer, information processing system
is a type of (narrower)
make a replica of
"copy that drawing"; "re-create a picture by Rembrandt"
copy, re-create
become or cause to become obstructed
"The leaves clog our drains in the Fall"; "The water pipe is backed up"
back up, choke, choke off, clog, clog up, congest, foul
is derived from
backup