unvigilant
Lacking careful attention
Unvigilant means not watchful or alert, failing to maintain careful attention.
Someone unvigilant misses what a more attentive person would catch: The unvigilant guard didn't notice the intruder slip past.
The word implies a lapse in the duty to stay aware—whether through carelessness, fatigue, or complacency.
Careless of consequences
- unobservantNot paying attention
- obliviousLacking any awareness
- distractedUnable to concentrate
- absentmindedInattentive to immediate surroundings
preoccupied · unfocused · unmindful · unaware · daydreaming · scatterbrained · dreamy · disengaged
Neglectful of duty
- laxInsufficiently firm or rigorous
- neglectfulFailing to care properly
- derelictAbandoned or neglectful
- slipshodCareless and hasty
sloppy · slack · delinquent · defaulting · shirking
Carelessly ignoring danger
- thoughtlessShowing no consideration
- irresponsibleLacking sense of duty
- imprudentLacking careful forethought
- incautiousCarelessly unguarded
unwary · unthinking · improvident · hasty · rash · foolhardy · injudicious · unguarded
Out in open
- unprotectedWithout safeguard or shield
- defenselessWithout means to resist
- unguardedWithout protection or caution
- openNot closed
susceptible · assailable · unprepared · caught-off-guard · blindsided · ambushable · unsecured · unwatched
Feeling no worry
- nonchalantCalmly unconcerned
- indifferentLacking interest or concern
- apatheticWithout feeling or concern
- insouciantCarefree and unconcerned
blasé · unbothered · cavalier · overconfident · smug · self-satisfied · trusting · naive
heedless
Careless of consequences
- unobservantNot paying attention
- obliviousLacking any awareness
- distractedUnable to concentrate
absentminded · preoccupied · unfocused · unmindful · unaware · daydreaming · scatterbrained · dreamy · disengaged · unheeding
remiss
Neglectful of duty
- laxInsufficiently firm or rigorous
- neglectfulFailing to care properly
- derelictAbandoned or neglectful
slipshod · sloppy · slack · delinquent · defaulting · shirking
reckless
Carelessly ignoring danger
- thoughtlessShowing no consideration
- irresponsibleLacking sense of duty
- imprudentLacking careful forethought
incautious · unwary · unthinking · improvident · hasty · rash · foolhardy · injudicious · unguarded · unsuspecting
exposed
Out in open
- unprotectedWithout safeguard or shield
- defenselessWithout means to resist
- unguardedWithout protection or caution
open · susceptible · assailable · unprepared · caught-off-guard · blindsided · ambushable · unsecured · unwatched
unconcerned
Feeling no worry
- nonchalantCalmly unconcerned
- indifferentLacking interest or concern
- apatheticWithout feeling or concern
insouciant · blasé · unbothered · cavalier · overconfident · smug · self-satisfied · trusting · naive · unsuspicious
vigil, vigilant, vigilance, surveillance, vigilante, vigilantly, vigilantism, vigilantes