"to put a new tread on (a tire)," 1908, from re- "back, again" (see re-) + tread (q.v.). The noun is attested from 1914; in World War I it was Australian slang for "a re-enlisted soldier."
retread an old plot
retract
retractable
retraction
retrain
retransmission
retread
retreat
retrench
retrenchment
retrial
retribute
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