fast

As an adjective happy

is experiencing the effect of favourable fortune; having the feeling arising from the consciousness of well-being or of enjoyment; enjoying good of any kind, as peace, tranquillity, comfort; contented; joyous.

As a verb fast is

.

As a verb fast

is .

As a letter d is

the fourth letter of the.

As a numeral d is

cardinal number five hundred (500).

As a symbol d is

deuterium, when it needs to be distinguished from ordinary hydrogen.

As verbs the difference between fast and colour

is that fast is while colour is to give something colour.

As a noun colour is

(lb) the spectral composition of visible light.

As an adjective colour is

conveying colour, as opposed to shades of grey.

As a verb fast

is .

As a letter s

is the letter s with a.

As a verb fast is

.

Abandoned is a related term of fast.

As verbs the difference between abandoned and fast

is that abandoned is (abandon) while fast is .

As an adjective abandoned

is self-abandoned, or given up to vice; immoral; extremely wicked, or sinning without restraint; irreclaimably wicked; as, an abandoned villain .

Fast is a related term of lightfooted.

As a verb fast

is .

As an adjective lightfooted is

.

Fast is a synonym of snappily.

As a verb fast

is .

As an adverb snappily is

in a snappy manner.

As verbs the difference between abrupt and fast

is that abrupt is (archaic) to tear off or asunder while fast is .

As an adjective abrupt

is (obsolete|rare) broken away (from restraint) .

As a noun abrupt

is (poetic) something which is ; an abyss .

As an adjective excellent

is of the highest quality; splendid.

As an adverb excellent

is (obsolete) excellently.

As a verb fast is

.