idioms using “back”

Back up

Go back to the previous comment

“Back up Kaori-san. Did you just say that you have decided to accept the job?”

Back off

Slow down, step away

“The salesman was so pushy that I told him he needed to back off.”

Back on track

Working smoothly again

“There was tension with the client over the costs but now the relationship is back on track.”

Back out

Change one’s mind

“The baseball coach was about to sign the multi-year contract but backed out at the last minute.”

Backtrack

To retrace a sequence of events or items

“Some of the dates are missing so we need to backtrack through the paperwork and find them.”