fast

As a verb fast

is .

As an adjective false is

(label) one of two states of a boolean variable; logic.

As a verb fast

is .

As an adjective undefined is

lacking a definition or value.

As an adverb cat

is how much.

As an adjective cat

is how much.

As a verb fast is

.

As verbs the difference between fast and raped

is that fast is to abstain from food, or eat very little, especially for religious or medical reasons while raped is past tense of rape.

As an adjective fast

is firmly or securely fixed in place; stable.

As an adverb fast

is in a firm or secure manner, securely; in such a way as not to be moved .

As a noun fast

is a train that calls at only some stations it passes between its origin and destination, typically just the principal stations.

As an interjection fast

is short for "stand fast", a warning not to pass between the arrow and the target.

Unmovable is a related term of fast.

As an adjective unmovable

is not physically possible to be moved.

As a verb fast is

.

Fast is a synonym of expeditiously.

As a verb fast

is .

As an adverb expeditiously is

in an expeditious manner.

Fast is a synonym of steady.

As verbs the difference between fast and steady

is that fast is while steady is to stabilize something; to prevent from shaking.

As an adjective steady is

firm in standing or position; not tottering or shaking; fixed; firm.

As a noun steady is

(informal) a regular customer.

Fast is a synonym of mercurial.

As a verb Fast

is .

As a noun mercurial is

(obsolete) any of the plants known as mercury.

As an adjective mercurial is

(often capitalized, see (mercurial)) pertaining to the planet mercury.