不知進退

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

no; not so / (bound form) not; un-

not to know / unaware / unknowingly / fig. not to admit (defeat, hardships, tiredness etc)

to know / to be aware

to go forward / to advance / to go in / to enter / to put in / to submit / to take in / to admit / (math.) base of a number system / classifier for sections in a building or residential compound

to advance or retreat / knowing when to come and when to leave / a sense of propriety

to retreat / to decline / to move back / to withdraw

to retreat; to withdraw / to reject; to return (sth) / to decline