imperceptible

As adjectives the difference between imperceptible and unobservable

is that imperceptible is not perceptible, not detectable, too small in magnitude to be observed while unobservable is that cannot be observed.

As a noun unobservable is

something that cannot be observed.

As adjectives the difference between imperceptible and unfeeling

is that imperceptible is not perceptible, not detectable, too small in magnitude to be observed while unfeeling is without emotion or sympathy.

As adjectives the difference between imperceptible and imperceptive

is that imperceptible is not perceptible, not detectable, too small in magnitude to be observed while imperceptive is unable to perceive.

Imperceptible is a related term of impassive.

As adjectives the difference between imperceptible and impassive

is that imperceptible is not perceptible, not detectable, too small in magnitude to be observed while impassive is having, or revealing, no emotion.

Imperceptible is a related term of stoical.

As adjectives the difference between imperceptible and stoical

is that imperceptible is not perceptible, not detectable, too small in magnitude to be observed while stoical is enduring pain and hardship without showing feeling or complaint.

Imperceptible is a related term of torpid.

As adjectives the difference between imperceptible and torpid

is that imperceptible is not perceptible, not detectable, too small in magnitude to be observed while torpid is unmoving, dormant or hibernating.

Imperceptible is a related term of dull.

As adjectives the difference between imperceptible and dull

is that imperceptible is not perceptible, not detectable, too small in magnitude to be observed while dull is lacking the ability to cut easily; not sharp.

As a verb dull is

to render dull; to remove or blunt an edge or something that was sharp.

As adjectives the difference between infinitesimal and imperceptible

is that infinitesimal is infinitesimal while imperceptible is not perceptible, not detectable, too small in magnitude to be observed.

As adjectives the difference between insensible and imperceptible

is that insensible is unable to be perceived by the senses while imperceptible is not perceptible, not detectable, too small in magnitude to be observed.

As adjectives the difference between striking and imperceptible

is that striking is making a strong impression while imperceptible is not perceptible, not detectable, too small in magnitude to be observed.

As a verb striking

is .

As a noun striking

is the act by which something strikes or is struck.