impassive

As an adjective impassive

is having, or revealing, no emotion.

As a verb blase is

to blow.

Imperceivable is a related term of impassive.

As adjectives the difference between imperceivable and impassive

is that imperceivable is that cannot be perceived; imperceptible while impassive is having, or revealing, no emotion.

As adjectives the difference between impassive and impassionate

is that impassive is having, or revealing, no emotion while impassionate is filled with passion; impassioned.

As a verb impassionate is

to affect powerfully; to arouse the passions of.

As adjectives the difference between insensate and impassive

is that insensate is having no sensation or consciousness; unconscious; inanimate while impassive is having, or revealing, no emotion.

As a noun insensate

is one who is insensate.

As a verb insensate

is to render insensate; to deprive of sensation or consciousness.

As adjectives the difference between impassive and imbibe

is that impassive is having, or revealing, no emotion while imbibe is soaked, saturated.

As a verb imbibe is

.

Impassive is a related term of steely.

As adjectives the difference between impassive and steely

is that impassive is having, or revealing, no emotion while steely is having qualities resembling those of steel, especially hard and resolute.

Coldblooded is a synonym of impassive.

As adjectives the difference between coldblooded and impassive

is that coldblooded is while impassive is having, or revealing, no emotion.

As adjectives the difference between impassive and unsusceptible

is that impassive is having, or revealing, no emotion while unsusceptible is not susceptible.

Uncaring is a related term of impassive.

As adjectives the difference between uncaring and impassive

is that uncaring is characterized by a lack of care; not caring while impassive is having, or revealing, no emotion.

As an adjective impassive

is having, or revealing, no emotion.

As a noun impasse is

a road with no exit; a cul-de-sac.