procrastinate: [16] Crās was Latin for ‘tomorrow’ (its antecedents are uncertain). The adjective derived from it was crāstinus ‘of tomorrow’, which in turn formed the basis of a verb prōcrāstināre ‘put forward to tomorrow’ (prō- denotes ‘forward’). By the time it reached English it had broadened out to simply ‘delay’.
1580s, a back formation from procrastination or else from Latin procrastinatus, past participle of procrastinare "to put off till tomorrow; defer, delay" (see procrastination). Related: Procrastinated; procrastinating. Earlier verb was procrastine (1540s), from French.
