indeclinable

As adjectives the difference between indeclinable and undeclinable

is that indeclinable is not grammatically inflected, especially if others of its class are usually inflected while undeclinable is alternative form of lang=en.

As nouns the difference between indeclinable and undeclinable

is that indeclinable is a word that is not grammatically inflected while undeclinable is alternative form of lang=en.

As an adjective indeclinable

is indeclinable.

As an adverb indeclinably is

(grammar) without variation of termination.

As a noun taxonomy

is the science or the technique used to make a classification.

As an adjective indeclinable is

indeclinable.