go back over (a path or one's steps)

they never retread the same ground

put a new tread on (a worn tyre)

1.3 million tyres were retreaded

a tyre that has been given a new tread; a remould

a superficially altered version of a film, book, etc.

a retread of the 30s romantic comedy

a person retrained for new work or recalled for service

no administration in recent memory has had so many retreads