you

As an adverb be is

well.

As a noun initialism is

a term formed from the initial letter or letters of several words or parts of words, but which is itself pronounced letter by letter.

As a noun fly is

(zoology) any insect of the order diptera; characterized by having two wings, also called true flies or fly can be (obsolete) the action of flying; flight.

As a verb fly is

to travel through the air, another gas or a vacuum, without being in contact with a grounded surface or fly can be (baseball) to hit a fly ball; to hit a fly ball that is caught for an out compare ground (verb) and line (verb).

As an adjective fly is

(slang|dated) quick-witted, alert, mentally sharp, smart (in a mental sense).

As an adjective supercalifragilisticexpialidocious

is fantastic, very wonderful.

As a noun knickerbocker

is a new yorker, particularly a scion of its old dutch families.

As an initialism npc

is (video games) non-player character.

As a verb te

is .

As a determiner their is

.

As an adjective undefined is

lacking a definition or value.