undetectable
Beyond all perception
Undetectable means impossible or extremely difficult to detect.
An undetectable poison leaves no trace.
An undetectable flaw escapes notice.
In HIV treatment, an undetectable viral load means the virus is suppressed below measurable levels—a milestone indicating effective treatment and negligible transmission risk: She's been undetectable for three years.
Cannot be sensed
- slightMinor or thin
- faintWeak and indistinct
- minuteSixtieth of an hour
- negligibleToo small to consider
indistinct · nuanced · gradual · incremental · trace · marginal · delicate · fine
Producing no sound
- soundlessProducing no audible noise
- noiselessProducing no sound
- quietLacking in sound
- hushedReduced to silence
muted · whispered · soft · faint · ultrasonic · subsonic · muffled · dampened
Act of hiding something
- stealthySecretly cautious in movement
- ninjaJapanese espionage agent
- covertIntentionally concealed
- spyCovert information gatherer
untraceable · encrypted · anonymous · off-grid · jamming · countermeasure · evasive · ghosting
Not perceived visually
- imperceptibleCannot be sensed
- transparentAllowing light through
- see-throughAllowing vision through
- translucentPermitting diffused light passage
vanishing · microscopic · nanoscale · colorless · odorless · traceless · unnoticeable · indiscernible
Made invisible deliberately
- camouflagedVisually hidden by coloring
- covertIntentionally concealed
- cloakedConcealed or covered
- disguisedConcealed true identity
masked · veiled · shrouded · buried · latent · undercover · clandestine · cryptic
imperceptible
Cannot be sensed
negligible · indistinct · nuanced · gradual · incremental · trace · marginal · delicate · fine · unnoticeable
silent
Producing no sound
hushed · muted · whispered · soft · faint · ultrasonic · subsonic · muffled · dampened · silenced
cloaking
Act of hiding something
spy · untraceable · encrypted · anonymous · off-grid · jamming · countermeasure · evasive · ghosting · burner
unseen
Not perceived visually
- imperceptibleCannot be sensed
- transparentAllowing light through
- see-throughAllowing vision through
translucent · vanishing · microscopic · nanoscale · colorless · odorless · traceless · unnoticeable · indiscernible · unobservable
concealed
Made invisible deliberately
- camouflagedVisually hidden by coloring
- covertIntentionally concealed
- cloakedConcealed or covered
disguised · masked · veiled · shrouded · buried · latent · undercover · clandestine · cryptic · furtive
- HIV/AIDSHIV, AIDS, AIDS crisis, AIDS quilt, antiretrovirals
- Virologyviral replication, viral shedding, bacteriophage, tropism, DNA virus
- visibilityvisibility, visible, invisible, hidden, hide
- toxicity levelstoxic, nontoxic, lethal, safe, hazardous
- barely therefaint, subtle, trace, hint, fleeting
undetectabledetectable
Capable of being noticed
perceptible · discernible · perceivable · noticeable · observable