| inadvertently(adverb, short, sudden, suddenly, unexpectedly) |
| unwittingly(adverb, short, sudden, suddenly, unexpectedly) |
| unawares(adverb, suddenly, unexpectedly, ignorantly, unwatchful) |
| unconsciously(adverb, short, sudden, suddenly, unexpectedly) |
| accidentally(adverb, short, sudden, suddenly, unexpectedly) |
| ignorantly(adverb, short, sudden, suddenly, unexpectedly) |
| unintentionally(adverb, short, sudden, suddenly, unexpectedly) |
| mistakenly(short, sudden, suddenly, unexpectedly, unawares) |
| obliviously |
| unknowing |
| aback(short, sudden, suddenly, unexpectedly, unawares) |
| abruptly(short, sudden, suddenly, unexpectedly, unawares) |
| by accident(expression, short, sudden, suddenly, unexpectedly) |
| by mistake(expression, short, sudden, suddenly, unexpectedly) |
| by surprise(expression, short, sudden, suddenly, unexpectedly) |
| carelessly(adverb, short, sudden, suddenly, unexpectedly) |
| inattentively |
| innocently |
| involuntarily |
| off guard(expression, short, sudden, suddenly, unexpectedly) |