perpetual

As an adjective perpetual

is lasting forever, or for an indefinitely long time.

As a verb permeate is

to pass through the pores or interstices of; to penetrate and pass through without causing rupture or displacement; -- applied especially to fluids which pass through substances of loose texture; as, water permeates sand.

As a noun permeate is

a watery by-product of milk production.

As an adjective perpetual

is lasting forever, or for an indefinitely long time.

As an adverb incessantly is

in a manner without pause or stop, especially to the point of annoyance; not ceasing.

As an adjective perpetual

is lasting forever, or for an indefinitely long time.

As a verb perpetrate is

to be guilty of, or responsible for a crime etc; to commit.

As a noun continuum

is a continuous series or whole, no part of which is noticeably different from its adjacent parts, although the ends or extremes of it are very different from each other.

As an adjective perpetual is

lasting forever, or for an indefinitely long time.

As an adjective perpetual

is lasting forever, or for an indefinitely long time.

As an adverb perpetually is

seeming to never end; endlessly; constantly.

As adjectives the difference between external and perpetual

is that external is outside of something; on the exterior while perpetual is lasting forever, or for an indefinitely long time.

Unalterable is a related term of perpetual.

As adjectives the difference between unalterable and perpetual

is that unalterable is incapable of changing or being altered while perpetual is lasting forever, or for an indefinitely long time.

As adjectives the difference between perpetual and cognitive

is that perpetual is lasting forever, or for an indefinitely long time while cognitive is relating to the part of mental functions that deals with logic, as opposed to affective which deals with emotions.

As an adjective perpetual

is lasting forever, or for an indefinitely long time.

As an adverb mostly is

mainly or chiefly; for the most part; usually, generally, on the whole.

As an adjective perpetual

is lasting forever, or for an indefinitely long time.

As a noun stability is

the condition of being stable or in equilibrium, and thus resistant to change.