Synonyms to unknowingly

unawares, aback, abruptly, accidentally, bang, by accident, by surprise, dash, guiltlessly, hastily, ignorantly, impetuously, implausibly, improbably, impulsively, inadvertently, innocently, insensibly, like a flash, like a thunderbolt, mistakenly, of a sudden, off base, on short notice, plop, plump, plunk, pop, precipitantly, precipitately, precipitously, sharp, short, slap, smack, startlingly, sudden, suddenly, surprisingly, unanticipatedly, unaware, unconsciously, unexpectedly, unforeseeably, unguiltily, unintentionally, unmindfully, unpredictably, unprepared, unready, unsuspectingly, unwittingly, without notice, without warning, witlessly