GMAT Vocabulary Flash Cards @ englishpdf.com and englishteststore.com File 583 retroaction (n) a reverse action retroactive (adj) Operative on, affecting, or having reference to past events, transactions, responsibilities retrograde (v) To cause to deteriorate or to move backward retrogression (n) A going or moving backward or in a reverse direction retrospect (n) A view or contemplation of something past retrospective (adj) Looking back on the past reunite (v) To unite or join again, as after separation revelation (n) A disclosing, discovering, or making known of what was before secret, private, or unknown