incessant
     adj 1: occurring so frequently as to seem ceaseless or
            uninterrupted; "a child's incessant questions"; "your
            perpetual (or continual) complaints" [syn: {perpetual},
             {endless}]
     2: uninterrupted in time and indefinitely long continuing; "the
        ceaseless thunder of surf"; "in constant pain"; "night and
        day we live with the incessant noise of the city"; "the
        never-ending search for happiness"; "the perpetual
        struggle to maintain standards in a democracy"; "man's
        unceasing warfare with drought and isolation";
        "unremitting demands of hunger" [syn: {ceaseless}, {constant},
         {never-ending}, {perpetual}, {unceasing}, {unremitting}]
Source: WordNet® 2.0