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imperceptible

imperceptible

9 7.8
Very small or slight and hard to notice
  • adjective
  • /ˌɪmpərˈsɛptəbl/
translation icon : imperceptible
  • Al gave me an almost imperceptible nod and kept on moving along the picket line.
  • almost imperceptible
  • nearly imperceptible
  • imperceptible movement

There are a lot of little imperceptible layers that have to be let go.

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Examples

  • At rest, their shallow breathing was almost imperceptible, and casual observers sometimes thought they were dead.

    Academic text (1995)
  • The problem is that there's this kind of slow, imperceptible shift from Wellness to illness.

  • The advance and retreat of the seas are imperceptible to anyone watching.

    Fiction book (1999)
  • It's almost imperceptible to the naked eye, but there's a jump there.

  • "In zero gravity, space travel was often characterized by silence and almost imperceptible changes in motion."

    Fiction book (2000)
  • But a closer inspection reveals an almost imperceptible diversity of expressions.

    Academic text (2005)
  • The shifting implications, according to the stacks supervisor, would be imperceptible and kept to a small area.

    Academic text (2012)
  • The pores on your skin have already opened up, secreting an imperceptible amount of pheromones into the air.

  • Human rights activism is a frustrating endeavor because its fruits are often imperceptible and interminably delayed.

    Academic text (1994)
  • The teacher's imperceptible changes in her tone made the students pay more attention.

Synonyms

subtle
vsimperceptible
276 6.0

Not easy to notice or understand because it is small

is more about tiny changes that make something hard to perceive rather than being complex
invisible
vsimperceptible
148 2.7

Not easy for other people to notice

is more about slight gradual perception problems rather than complete absence from view
unseen
vsimperceptible
66 3.2

Hidden so people do not notice it

is about being hard to notice because of subtlety rather than simply not observed
undetectable
vsimperceptible
23 6.5

Very hard or impossible to notice

is slight or gradual making perception hard rather than fully impossible
indiscernible
vsimperceptible
4 8.8

Hard to see, hear, or notice

is slight or gradual so it causes difficulty noticing rather than complete inability
unnoticeable
vsimperceptible
2 4.6

Hard to see or notice

is caused by being slight or gradual rather than by lack of attention
unobservable
vsimperceptible
1 8.0

Not able to be seen or noticed when you look

is about being slight or subtle so it escapes notice even when observed
unobvious
vsimperceptible
1 7.8

Hard to notice or understand at first

is about slight change that hinders perception rather than missing clarity alone
nonobvious
vsimperceptible
1 7.4

Not easy to see or understand without careful thinking

is more sensory and gradual not only requiring thought to understand
impalpable
vsimperceptible
1 9.3

Hard to feel or notice with your senses

is broader covering visual and gradual cases not only touch or feeling
unperceived
vsimperceptible
1 8.2

Other people do not notice someone or something

is the slight gradual property that makes something hard to notice
imperceivable
vsimperceptible
8.4

Too small to be seen, heard, or noticed

is slight or gradual and mainly causes difficulty noticing rather than total impossibility
unperceivable
vsimperceptible
9.1

Too small, slow, or quiet for people to notice

is slight and gradual so it is hard to notice rather than absolute
insensible
vsimperceptible
7.4

So small that people do not notice it

is broader including subtle cases not explained by mere smallness
incognizable
vsimperceptible
  • Formal
9.9

Not possible for people to know or understand

is about slight gradual subtlety that makes noticing difficult rather than unknowability
inapparent
vsimperceptible
8.1

Hard to see or notice

is about gradual subtlety causing difficulty noticing rather than being clearly hidden

Antonyms

1.0

Easy to see or understand

8 5.4

Able to be seen, heard, or noticed

How Perceptible

obvious
1.0
noticeable
65 3.2
slight
594 1.2
faint
148 2.7
imperceptible
9 7.8

Surface Forms

imperceptible positive
imperceptibly positive

Morphology

imperceptible = perceptible (transparent) = im + percept + ible

Formed by the negative prefix 'im-' + 'perceptible' ('able to be perceived'), so the meaning 'not able to be perceived' follows directly.

Etymology

The word imperceptible begins with im- ('not') and the rest comes from the common verb perceive ('to notice' or 'to feel'). So imperceptible means 'not able to be noticed' or so small you cannot feel it.