退出

walk out of a meeting; stage a walkout (as a protest)

The project became so expensive that we had to pull out.

He announced his retirement from basketball.

withdraw/resign from an organization

withdraw from action

retire/resign from politics

quit the games; pull out of the games

secede from the union

step down from the stage of history

back out of a deal

step down from the frontline of production

withdraw from a competition; quit a competition; pull out of a match; leave the field; scratch from a race

Log out before switching off the computer.