prettiest

As adjectives the difference between prettiest and undefined

is that prettiest is (pretty) while undefined is lacking a definition or value.

As adjectives the difference between pretty and prettiest

is that pretty is cunning; clever, skilful while prettiest is (pretty).

As an adverb pretty

is somewhat, fairly, quite; sometimes also (by meiosis) very.

As a noun pretty

is something that is pretty.

As a verb pretty

is to make pretty; to beautify.

As adjectives the difference between pettiest and prettiest

is that pettiest is (petty) while prettiest is (pretty).

As an adjective prettiest

is superlative of pretty.

As a noun pretties is

plural of pretty.

As a verb pretties is

third-person singular of pretty.