1 to retreat

2 to decline

3 to move back

4 to withdraw

1 to retire

2 retirement (from work)

1 to withdraw

2 to abort

3 to quit

4 to log out (computing)

1 to fall back

2 to go in reverse

1 to escape unscathed

2 to get through in one piece

1 not knowing when to come or leave (idiom); with no sense of propriety

1 lit. to beat the return drum (idiom)

2 fig. to give up

3 to turn tail

1 to sound out the difficulties and retreat to avoid defeat (idiom); fig. to back out of an awkward situation

2 to get out on finding out what it's really like

1 better to go home and weave a net than to stand by the pond longing for fish (idiom)

2 one should take practical steps to achieve one's aim

1 to shrink back as the time for battle approaches (idiom)

2 to get cold feet