As a noun rest

is prison.

As an adjective undefined is

lacking a definition or value.

As adjectives the difference between ecologic and undefined

is that ecologic is ecological while undefined is lacking a definition or value.

As a noun writing

is (uncountable) of symbols such as letters that express some meaning.

As a verb writing

is .

As an adjective undefined is

lacking a definition or value.

As adjectives the difference between skill and undefined

is that skill is (uk|slang) great, excellent while undefined is lacking a definition or value.

As a verb skill

is to set apart; separate.

As a noun skill

is capacity to do something well; technique, ability skills are usually acquired or learned, as opposed to abilities, which are often thought of as innate.

As a noun epistle

is a letter, or a literary composition in the form of a letter.

As a verb epistle

is (obsolete) to write; to communicate in a letter or by writing.

As an adjective undefined is

lacking a definition or value.

As adjectives the difference between blithe and undefined

is that blithe is (dated or literary) happy, cheerful while undefined is lacking a definition or value.

As a noun principle

is a fundamental assumption.

As a verb principle

is to equip with principles; to establish, or fix, in certain principles; to impress with any tenet or rule of conduct.

As an adjective undefined is

lacking a definition or value.

As a noun paren

is (informal) a parenthesis (bracket used to enclose parenthetical material in text).

As an adjective undefined is

lacking a definition or value.

As a noun renewal

is the act of renewing.

As an adjective undefined is

lacking a definition or value.

As adjectives the difference between fleeting and undefined

is that fleeting is passing quickly while undefined is lacking a definition or value.

As a verb fleeting

is .